By Sing H. Lin, Ph.D., E-Mail: SINGHLIN@GMAIL.COM

Original appeared on January 3, 2007, Latest Revision on September 1, 2014

Abstract

My 21 Year Work: For about 21 years since my tour of The Mystery Spot in Santa Cruz, California in 1993,
of Oregon Vortex in Gold Hill, Oregon in 2004 and of the Magnetic Hill in eastern Canada in 2005, I have
been thinking about and investigating on the strange gravity phenomena on hundreds of gravity hills all over
the world and at several known Mystery Spots.

Gravity Hills: Many people have observed and reported a strange gravity phenomenon on strange slopes
of paved roads at hundreds of locations all over the world. People pour water on such strange slope and
water flows uphill. People put plastic water bottle on such strange slope and the plastic water bottle with
water rolls uphill. Vehicles with transmission shifted to neutral gear and brake released simply roll uphill on
such strange slopes.

Mystery Spots: At Oregon Vortex and several other similar Mystery Spots, one of several well known
mysteries is the significant change of relative heights of two persons when they switch their standing
positions on a demonstration platform inside the mystery spot area.

Illusion Theory: Many people simply dismiss such strange gravity phenomena on those gravity hills and in
those Mystery Spots as illusion. Some people have also done some tests and measurements on some of
those gravity hills and claimed that they have proved that it is an illusion. However, my careful examinations
of these tests, measurements and claims indicate that they are NOT valid proofs because of serious
defects in such tests and measurements as explained in this paper.

Six Evidences against Illusion Theory: My 21-year research collected six sets of independent evidences
that cast serious doubt on the validity of illusion theory. These evidences indicate that the strange gravity
phenomena on these gravity hills and mystery spots are real, are caused by significant abnormal gravity and
are not due to illusion. For example, a measurement in Oregon Vortex indicates that the strength of local
abnormal gravity in Oregon Vortex can be as strong as 10 % of earth gravity.

Mystery in Astronomy: Many astronomers and scientists all over the world have been struggling with the
mysterious dark matters based on astronomical observations. These astronomical observations and
analyses imply the existence of huge amount of unknown dark matter that is five times more abundant than
our familiar ordinary matter. But our scientific knowledge still does not understand dark matters well yet.

My Theory: My 21-year research on this project leads me into the discovery of the dark matter based
theory and its associated model for the strange gravity phenomena on those gravity hills and mystery spots.
It is described briefly in Section 9 on this web page and described in details in my companion website at:

http://
www.shltrip.com/Oregon-Vortex.html

This dark matter based Model provides scientific explanation for all observed strange gravity phenomena
and mysteries in the known mystery spots and hundreds of gravity hills all over the world.

The long lasting oscillation of dark matter particles in earth's gravity well for billions of years implies the
preliminary finding (A) that there are practically no collisions between dark matter particles and our familiar
ordinary matters. The 10-year results of several deep underground collision experiments seem to be
consistent with the preliminary finding (A). However, several more advanced deep under ground collision
experiments with much more sensitivity, starting now or soon, can help to check to see if the preliminary
finding (A) for dark matter is correct or not.

Furthermore, precision scientific measurements on the local strong gravity and its associated effects of dark
matter may be a promising and productive way to investigate the characteristics of mysterious dark matter.

********************************************
For about 21 years since my tour of The Mystery Spot in Santa Cruz, California, USA in 1993, of Oregon
Vortex in Gold Hill, Oregon, USA in 2004 and of the Magnetic Hill in eastern Canada in 2005, I have been
thinking about and investigating on the issue of whether such strange gravity hill effects and gravity
mysteries are real or illusion and searching for a possible scientific explanation for such strange gravity
phenomena and mysteries. I started presenting this web page on January 3, 2007 soon after my
Travelogue website ( WWW.SHLTRIP.COM ) was established in December 2006. I have been revising and
updating this web page from time to time as I gain more insight and relevant information since 2005 in my
search for a scientific explanation for the strange gravity phenomena on hundred of gravity hills and at
several known mystery spots. Most recent update of this web page was on September 1, 2014. As of
November 11, 2014, this web page has been accessed 9,812 times by my friends and strangers all over
world.

**********************************************
PowerPoint Presentations:

The highlights of this lengthy web page are summarized in the following PowerPoint Presentation (PPP). I
have presented this set of PPP in the Quarterly Meeting of the Distinguished Citizen Society International -
Eastern USA Chapter (DCSIE) on June 8, 2013 and in the Meeting of CACA 40-Plus Club on December 31,
2013, both in New Jersey, USA.

Click the following link to see the PowerPoint Presentation.










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Table of Contents

1. Strange Gravity Phenomenon at Magnetic Hill in Eastern Canada

1.1 First Set of Evidence Against Illusion Theory for Gravity Hills

1.2. Location and Direction:

1.3. Not All Gravity Hills Are Equal

2. Gravity Hills on Coastal Highways:

2.1.  Example One of Coastal Gravity Hills

2.2. More Examples of Known Coastal Gravity Hills

2.3. Second Set of Evidence Against Illusion Theory for Gravity Hills

3. Detection of Abnormal Gravity at Mystery Spot in Michigan by Three Surveyors

3.1. Third Set of Evidence Against Illusion Theory for Gravity Hills

4. More Evidences Against Illusion Theory

4.1. Detection of Abnormal Gravity by Gravitational Time Dilation

4.1.1. Fourth Set of Evidence Against Illusion Theory

4.2. Asymmetric Pendulum as another Evidence against Illusion Theory

4.3. Sixth Evidence Against Illusion Theory

5. Problems in Existing Measurement Results that Support Illusion Theory

6. GPS Measurements on Gravity Hill

6.1. Contradictory Results from GPS Measurements on a Gravity Hill

6.2. Poor Accuracy of Consumer-Grade Single GPS Receiver for Elevation
Measurements

7. Is It Magnetic Force or Electric Force?

8. Many Other Locations with Similar Strange Gravity Phenomenon

9. What is the Source for Abnormal Gravity on Gravity Hills and Mystery Spots?

9.1. Discovery Process

9.2. Dark Matter Based Theory and Model

9.3. More Details

10. Concluding Remark

11. Technical Background of the Author of This Web Page

**************************************************************************

1. Strange Gravity Phenomenon at Magnetic Hill in Eastern Canada

In July 2005 on our way to tour New Brunswick, Nova Scotia and Newfoundland in eastern Canada,
we took a side tour to visit  Magnetic Hill near the City of Moncton in the Province of New
Brunswick. Please take a look at the following 8 pictures that I took at the Magnetic Hill.
Picture 1: At this location, visitors can drive their cars to the lowest point (bottom of the hill marked by a
white post on the road side) in the middle of this section of the road as shown in the following second
picture.
Picture 2: At the lowest point in the middle of this section of the road, the visitor stops the car, shifts the
transmission of the car to the neutral position and releases the brake. (Some visitors even turn off the
engine entirely at this point.) Then the car will start rolling up the hill (slope of the road) on its own and will
keep on going up the hill as shown in the following two pictures.
It is worthwhile to enjoy such strange experience if you have an opportunity to travel near that area in the
future for sightseeing. There are several tourist attractions in that area near beautiful Bay of Fundy such
as Hopewell Rocks to see world's highest tidal range, Mary's Point and Johnson's Mills to see huge
number of migratory shore birds feeding on mud flats of Bay of Fundy during migration season, beautiful
Fundy National Park, whale watching in Bay of Fundy, Reversing Falls at Saint John, beautiful Cape
Brenton Highlands National Park, etc. as described in details in my Travelogue web page at:

http://
www.shltrip.com/Nova_Scotia_and_New_Brunswick.html

Due to the popularity of this strange phenomenon on this section of the road, the local government was
willing to spent money to construct a parallel new road (Mountain Road) to bypass this section of the road
so that many visitors can try it to experience the sensation of the strange gravity phenomenon on this
section of the road without worrying about collision accident with regular vehicular traffic on the road.

When I was on the waiting line described above in July 2005, an old guy told me that this was his second
time to visit Magnetic Hill. The first time was about 50 years ago when he was a teenager. He said that 50
years ago, they did not use cars but used bicycles. He sat on the bicycle, did not pedal the bicycle, but the
bicycle just rolled up the hill on its own.

The brochure entitled “The Story of Moncton’s Mysterious Magnetic Hill” for visitors at Magnetic Hill in
Moncton indicates that the local farmers had observed this recurring strange phenomenon on their horse
wagons in the early 1800’s. When they were going downhill on this section of the road, the horse seemed
to be using substantial effort to pull the wagon to go downhill. But when they were going uphill, the wagon
would run up on the heels of startled horse. There were also stories of barrels and bales of dry goods
rolling mysteriously “uphill”.

Observers also note that water in the roadside drainage ditches also seemingly runs “uphill.” This rules out
magnetic as the force for this strange phenomenon.

1.2. Location of Magnetic Hill and Direction:

The Magnetic Hill is at the junction of Mountain Rd. and Magic Mountain Rd., Moncton, Canada. Phone:+1
506-853-3597. It is at northwest part of the city of Moncton in the Province of New Brunswick. Moncton is
in eastern Canada, near northeast tip of Bay of Fundy.

Directions: Take exit 450 of the Transcanada Highway (i.e. Highway #2) for Route 126 (i.e., Mountain
Road) and follow the roadside signs of Magnetic Hill. Phone: 506-853-3516.

Map: Click here to see interactive Google Map showing location of Magnetic Hill near Moncton


1.3. Not All Gravity Hills Are Equal

Over the last few years, I have visited 6 gravity hills: one in eastern Canada, three in Pennsylvania, USA
and two in southwest New Jersey, USA. Out of these 6 gravity hills, the Magnetic Hill at Moncton in
eastern Canada is most impressive because the slope of this gravity hill is steepest among these 6 gravity
hills that I have visited.

Some 5-Star famous gravity hills have steeper slopes so that rolling uphill on such steep slope is more
obvious, sensational and impressive. Two examples of such 5-star gravity hills are (a) Magnetic Hill near
Moncton in eastern Canada, and (b) Strange Slope (怪坡) near 瀋陽 in northeast China. These two gravity
hills are so popular, attracting so many visitors that the local governments are willing to invest money to
build a by-pass road for regular traffic to bypass the gravity hill so that many visitors can enjoy the thrill on
such gravity hill without worrying about automobile collision accident with regular road traffic. Some tour
guides indicate that Magnetic Hill at Moncton is the third most visited natural "wonder" in Canada.

More information on Strange Slope (
怪坡) near 瀋陽 in northeast China is available at the following
website:

http://
www.shltrip.com/Additional_Information_On_Gravity_Hills.html


The local governments are proud of such gravity hills in their towns, are willing to invest money to promote
them as their tourist attractions with several big road signs to welcome visitors from exit ramp of nearby
major highway all the way to the gravity hill. The visual perceptions of the steep slope by all visitors are
very clear and unambiguous on this particular gravity hill at Moncton. For visitors, it is very exciting and
thrilling to sit inside a vehicle rolling up this steep slope. The starting point and the end point of the gravity
hill are well marked. They charge $5 entrance fee to Magnetic Hill and practically all visitors are very
happy to pay such entrance fee to experience the thrill.

On the other hand, some other gravity hills have very mild and small slope such that the strange gravity hill
effect is NOT clear, not strong, not very sensational and not very impressive. On such mild slope, the
visual perception of the mild slope may be somewhat ambiguous and unclear depending on people. Some
people may get an ambiguity feeling in that they are not sure if it is really an uphill slope. Some people
argue that it is an uphill slope while other people argue that it is a downhill slope. With such ambiguity
feeling, many people then easily get the feeling that it may be just an illusion.

Such mild gravity hills are not impressive and are not attracting many visitors. The local governments do
not feel it is worthwhile to invest money to build a bypass road to bypass the regular road traffic away
from such mild gravity hills. The local governments are not willing to spend money to promote it as a
tourist attraction. Worse yet, some local policemen even tell occasional visitors that there is no gravity hill
here, go away, to prevent such visitors from causing traffic problems or irritating the local residents.

Therefore, if you want to see and experience the thrill of an impressive gravity hill with a strong feeling, it
is highly recommended that you go to see the Magnetic Hill at Moncton, in the Province of New Brunswick
in eastern Canada.

On the other hand, if you go to see a nearby feeble gravity hill with a mild slope as a first experience, you
probably will be disappointed with an ambiguous feeling. Such ambiguous and feeble feeling may be one
of the contributing factors for so many people to believe that it is just an illusion.

2. Gravity Hills on Coastal Highways:

Several known gravity hills are on coastal highways where the vast horizontal line of the nearby ocean is
readily visible as the horizontal reference to all visitors of the coastal gravity hills. On such coastal gravity
hills, the human perception of uphill slope should be correct because the reference horizontal line is readily
visible in the nearby ocean.

However, the Illusion Theory still asserts that human perceptions of the top and the bottom of such coastal
gravity hills are still "wrong". The Illusion Theory for such coastal gravity hills is usually supported by their
land survey measurements that indicate that the human perceived bottom is higher than the human
perceived top of such coastal gravity hill.

The evidences in Sections 3 and 4 indicate that significant abnormal gravity has been detected at several
mystery spots and gravity hills on earth surface. The key defect in existing land survey measurements on
gravity hills is that the liquid level bubble and the plumb line used in such land survey measurements are
affected by the abnormal gravity on such gravity hills such that the measurement results are wrong as
explained in Section 5 and illustrated on Figures 1 and 2 in Section 5.

2.1.  One Example of Coastal Gravity Hills

One example of such coastal gravity hills is known as Electric Brae on coastal road A719 in Ayrshire,
Scotland as described in the following Wikipedia website with 2 pictures:

http://
en.wikipedia.org/wiki/Electric_Brae

Two better pictures of this coastal gravity hill showing the visible nearby ocean and its horizontal line can
be seen by clicking the following links:

Picture A: Click here to see a picture of the coastal gravity hill Electric Brae near the ocean

Picture B: Click here to see a picture of the coastal gravity hill, Electric Brae, near the ocean

Several pictures on the following website also provide some nice views of the blue ocean near the coastal
road A719 near the area of the well known gravity hill, Electric Brae:

http://
bikeaboot.lawrab.com/2010/08/linwood-to-electric-brae.html


Three people on bicycles rolling up this coastal gravity hill on the coastal road 719 without peddling can be
seen at the following YouTube website:

http://
www.youtube.com/watch?v=MRuEUSiMalk

Again, this movie shows that the nearby ocean and its horizontal line are readily visible by everybody on
this coastal gravity hill on the coastal road A719.

More movie clips showing vehicles rolling up this coastal gravity hill near the ocean can be seen at the
following YouTube websites:

http://
www.youtube.com/watch?v=AofTlPpCIxQ

http://www.youtube.com/watch?v=DBSRLtLBvpA&feature=related

http://www.youtube.com/watch?v=JDhLTozHXlI&feature=related

http://www.youtube.com/watch?v=DsxrAGGcauk&feature=related

http://www.youtube.com/watch?v=5w8dMeysxaY&feature=related

Again, these movie clips all show that the nearby ocean and its horizontal line are readily visible by
everybody on this coastal gravity hill on the coastal road A719.

During the Second World War, even General Dwight D Eisenhower, who had a flat nearby at Culzean
Castle, often brought visitors here to see and to experience this strange gravity phenomenon on Electric
Brae.

2.2. More Examples of Known Coastal Gravity Hills

The second example of coastal gravity hill is known as Magnetic Hill, located on the coastal road A27
between Ballabeg and the Round Table crossroads, at Ronague near Colby on Isle of Man in the Irish Sea
in Great Britain. On such coastal gravity hill, visitors can see the reference horizontal line on the nearby
ocean as shown in the following YouTube videos:

http://
www.youtube.com/watch?v=UbUmOxytkZo

http://www.youtube.com/watch?v=9tNyPgLIUh4

http://www.youtube.com/watch?v=l_Ewl43YO5k&feature=related

In addition to these two examples of gravity hills on coastal roads where the reference horizontal line on
the nearby ocean is readily visible from these coastal gravity hills, there are more reported gravity hills on
coastal roads such as:

Known as Anti-Gravity Point on a coastal road at a place called Mirbat which is about 40 km east of
coastal City of Salalah in southern part of Oman (on the southeast coast of the Arabian Peninsula), and

A gravity hill in Cascais, on a coastal road N247 on a hill near Malveira da Serra and Guincho Beach,
West of Lisbon, Portugal.

2.3. Second Set of Evidence against Illusion Theory for Gravity Hills

These movies and pictures on coastal gravity hills show that the vast horizontal line of the nearby ocean is
readily visible as the horizontal reference to all visitors to the Electric Brae and other coastal gravity hills.
On such coastal gravity hills, I believe that human perception of uphill slope is correct because the
reference horizontal line is readily visible in the nearby ocean. This means that the observed strange
phenomenon of vehicles in neutral gear and brake released rolling uphill is real, not an illusion.

However, the results of carpenter’s level indication or land survey measurements in such area show that
human perceived top of the gravity hill is lower than the human perceived bottom of the gravity hill. Such
measurement results in such special areas are wrong because of the influence of the abnormal gravity (on
these gravity hills) on the critical level liquid bubble and the plumb line used in such land survey instruments.

The evidences 3 to 6 in Sections 3 and 4 show that significant abnormal gravity has been detected in
several mystery spots and gravity hills on earth surface. With the existence of significant abnormal gravity,
the level liquid bubble and the plumb line cannot provide the correct and critical reference horizontal line
and the critical reference vertical line for accurate land survey measurements or carpenter's level
measurements in such gravity hill areas or mystery spots areas. The wrong reference horizontal line and
the wrong reference vertical line lead to the wrong measurement results by the land survey measurements
and carpenter's level measurements in such gravity hill areas or mystery spots areas. This is explained in
more details with Figures 1 and 2 in Section 5.

On the other hand, several possible scientific methods of precision measurements that may be carried out
on gravity hills to get correct results are described in my web page entitled "Need for Precision Scientific
Measurements on Gravity Hills" at:

http://www.shltrip.com/Need_For_Precision_Measurements.html

3. Detection of Abnormal Gravity at Mystery Spot in Michigan by Three Surveyors

In early 1950s’, three surveyors discovered the Mystery Spot at 150 Martin Lake Road, St. Ignace,
Michigan, USA. They stumbled across an area of land where their surveying equipment did not seem to
work properly. No matter how many times they tried to level their tripod, through the use of a plum-bob or
bubble level, the plum-bob would always be drawn far to the east, even as the bubble level was reading
level as stated on the website of this Mystery Spot in Michigan at:

http://
www.mysteryspotstignace.com/

The gravity in that particular area is so abnormal that their land survey instrument could not function
properly.

It is highly desirable that suitable experienced land surveyors go to this Mystery Spot in Michigan again to
repeat such experiment to make sure that the strange behavior of land survey instrument at this special
location is repeatable and is a reliable method to detect strong abnormal gravity in such special location.

In addition the strange behavior of land survey instrument at Mystery Spot in Michigan, more difficulties in
land survey measurements at Mystery Spot in Santa Cruz, California and in Oregon Vortex in Oregon
because of significant abnormal gravity are described in the following website:

http://
www.shltrip.com/Dynamics_of_Gravity-Mysteries.html

3.1. Third Set of Evidence against Illusion Theory for Gravity Hills

The illusion theory asserts that the gravity at those gravity hills is normal and that the strange phenomenon
on gravity hills is due entirely to the illusion in human perception. However, the detection of significant
abnormal gravity by land survey instrument at this Mystery Spot in Michigan indicates that the strange
gravity phenomena in this Mystery Spot are most likely caused by the detected strong abnormal gravity
and are not caused by illusion in human perception.

Since significant abnormal gravity has been detected in this Mystery Spot in Michigan, in Mystery Spot at
Santa Cruz and at Oregon Vortex, it is likely that similar abnormal gravity also exists in other similar
Mystery Spots and in hundreds of gravity hills all over the world. Such detected abnormal gravity is the
third evidence against illusion theory for gravity hills.

4. More Evidences against Illusion Theory

4.1. Detection of Abnormal Gravity by Gravitational Time Dilation

Einstein’s Theory of General Relativity predicts that the closer the clock is to the source of strong
gravitation, the more slowly time passes. In other words, clocks which are far from massive bodies (or at
higher gravitational potentials) run faster, and clocks close to massive bodies (or at lower gravitational
potentials) run slower. This gravitational time dilation has been verified and demonstrated experimentally
many times as described in the following Wikipedia website:

http:/
/en.wikipedia.org/wiki/Gravitational_time_dilation

As an example, this gravitational time dilation effect is significant enough in the design of GPS (Global
Position System). The GPS satellites are orbiting at an altitude of approximately 20,200 km (12,600 mi)
where the earth gravity is weaker than that on earth surface. Calculations using general relativity
determined that the clocks on GPS satellites would be seen by Earth's observers to run 38 microseconds
faster per day, and this effect was corrected for in the design of GPS so that the GPS receiver on earth
surface can determine its position accurately based on the timing information of the GPS signals received
from GPS satellites as described in the following Wikipedia website.

http://
en.wikipedia.org/wiki/Global_Positioning_System

Nick Nelson has been doing research on gravity mysteries of Oregon Vortex for about 30 years. He
worked in Oregon Vortex for two years in 1999 and 2000. He also visited several other mystery spots and
has substantial experience and knowledge on various gravity mysteries in these mystery spots. Based on
the concept of gravitational time dilation from Theory of General Relativity, Nick Nelson, with help from the
management at the Oregon Vortex, performed an important experiment in the 1999 and 2000 involving
four identical digital watches to measure the gravitational time dilation inside and outside of Oregon
Vortex. The results, after 90 days of measurement, indicated that time in the Oregon Vortex run a quarter
of a second a day slower inside than outside as described in Section 6.3 entitled "Time anomalies" and in
the Second Part of the Proposal in the following website of Reference A:

Reference A:
http://www.vectorpub.com/Drasticchange%203-27-05.htm

Those same sections also mentioned that Doug Vogt, Nick Nelson and Dr. Nikolay Barashkov performed
similar important measurements inside and outside the Vortex at Confusion Hill at Piercy in northern
California, Magnetic Hill in Penngrove, California and Mystery Spot in Santa Cruz, California in 1996 to
2002 time frame. These measurements all found similar and significant gravitational time dilation in such
mystery spots.

That same Reference A also mentioned that similar gravitational time dilations have also been observed in
several locations in Russia. Some Russian scientists have been investigating and doing research on such
strange places in Russia with such gravitational time dilation.

In southwestern China in the mountainous area of Yunnan and Tibet, there is a very special valley known
as Shangri La (
香格里拉) as described in the 1933 novel "Lost Horizon" written by British author James
Hilton. That book was also turned into a movie, also called Lost Horizon, in 1937 by director Frank Capra.
According to this novel, a key feature of Shangri La is that people living in Shangri La age much slower
than people living outside of Shangri La. (However, the novel and the movie might have dramatized and
exaggerated the effects of gravitational time dilation.) The ancient Tibetan scriptures indicate the existence
of seven such special places according to the following Wikipedia website:

http://
en.wikipedia.org/wiki/Shangri-La

May be it is also worthwhile for scientists to seek out such special location(s) including the well known
Strange Slope (
怪坡) near ShenYang (沈阳) plus many other similar Strange Slopes and to do the clock
speed measurements to see if gravitational time dilation indeed exists in such special locations in China.  

4.1.1. Fourth Set of Evidence Against Illusion Theory

Such measured results of significant time dilation in Oregon Vortex in Oregon, Confusion Hill in northern
California, Magnetic Hill in Penngrove, California and Mystery Spot in Santa Cruz, California are strong
proof that the gravity in these mystery spots is significantly abnormal based on Einstein’s Theory of
General Relativity. This is an important evidence against Illusion Theory because Illusion Theory asserts
that the gravity in all those gravity hills and mystery spots is normal and all the observed strange gravity
phenomena are due entirely to illusion in human perception.

4.2. Asymmetric Pendulum as another Evidence against Illusion Theory

Another set of evidence against Illusion Theory is asymmetric behavior of pendulum in Oregon Vortex. The
idea is quite simple in that if the gravity in these gravity hills or Mystery Areas is abnormal with a significant
horizontal component of gravity, then the simple regular pendulum will show asymmetric behavior because
of the horizontal component of gravity.

Reference A indicates that some researchers had already done such experiments at Oregon Vortex in
Oregon, USA. Researchers push the weight at the bottom of the pendulum away from its equilibrium
position, and found that it is harder to push in one direction vs. opposite direction. Their measurements in
Oregon Vortex indicate that the difference in required forces to push the weight in the two opposite
directions is about 20%.

This measured result is again a good evidence for the existence of abnormal gravity in such special areas
and a good evidence against the Illusion Theory.

4.3. Sixth Evidence Against Illusion Theory

N. Nelson and I. Shnaper had conducted an experiment in the Mystery House in Oregon Vortex to
measure the strength of gravity. Their measured results indicate that the strength of gravity in Mystery
House in Oregon Vortex is 10 % less than that of normal gravity outside of Oregon Vortex. Such
measured significant abnormal gravity is another evidence against Illusion Theory because Illusion Theory
asserts that the gravity in all these special locations is normal and all the observed gravity mysteries are
due to illusion in human perception.

With such detected strong abnormal gravity in these mystery areas described in Sections 3 and 4, I
believe  that the strange gravity phenomena and mysteries in these Mystery Spots areas and gravity hills
are caused by such abnormal gravity and are not due to illusion in human perception.

Therefore, I do not believe in the illusion theory for gravity hills and for mystery areas because of these
six    independent sets of evidences described in Sections 1.1, 2.1, 3.1, 4.1, 4.2. and 4.3.

A potential seventh evidence against the Illusion Theory based on observed strange behavior of GPS
navigator in Mystery Spots is described at the end of the following web page:

http://
www.shltrip.com/Additional_Information_On_Gravity_Hills.html

5. Problems in Existing Measurement Results that Support Illusion Theory

Some people have done some measurements on some gravity hills by using the carpenter’s level or land
survey instrument. The results of such measurements indicate that the human perceived bottom of the
gravity hill is “higher” than the human perceived top of the gravity hill. Such measured results are often
used to support the Illusion Theory. These measurements depend on the liquid level bubble and plumb line
to establish the critical reference horizontal plane and critical vertical line for measurements.

However, none of such measurements took the precautionary step to check to see if the gravity at the
gravity hill is normal or not. The evidences 3, 4, 5 and 6 in Sections 3 and 4 indicate that the gravity at
these special locations of gravity hills and mystery spots are abnormal with a significant horizontal
component. The liquid level bubble and the plumb line used in those land survey measurements supporting
Illusion Theory are influenced by such abnormal gravity such that critical reference horizontal plane and the
critical reference vertical line are tilted slightly as illustrated in the following Figures 1 and 2:
About Author                                 Contact Author
21-Year Investigation of Gravity Hills and Mystery Spots
Leading into Dark Matters Trapped and Anchored in Earth's
Gravity Well as the Source of Abnormal Gravity
Picture 5: The blue minivan on the left lane is rolling up the strange slope backward while three other
vehicles (2 white color and 1 red color) on the right lane are going down to the bottom of the strange slope
to try the experience of rolling up the strange slope.

Some people stop at the bottom of the strange slope in the middle of this section of the road and roll up
the slope backward like the blue minivan does in this picture. But some other people do not stop at the
bottom, but go further to the far end which is higher than the bottom, then turn their vehicles around, then
come down to the bottom in the middle of this section of road and stop there, so that they can roll up the
hill forward (like that in Pictures 2, 3 and 4) instead of backward.
Picture 6: Several vehicles and a motor cycle are waiting on the line for their turns to go down the slope to
try the thrill and sensation on this strange slope. Notice that the road surface for the waiting line of
vehicles is reasonably level (i.e., not on a steep slope) and that the area for waiting line of vehicles is
substantial in size.

There were quite a few visitors with their cars, vans, trucks, recreational vehicles, motorcycles, etc.
waiting on line to try this strange phenomenon at Magnetic Hill when I was there in July 2005.
Picture 7: Three more vehicles waiting on line for their turns to try the strange slope. At the top of the
slope, there are two orange colored posts and two or more instructors telling visitors on what to do
when they drive down to the bottom of the slope to experience the strange phenomenon of Magnetic Hill.
Picture 8:  More vehicles waiting on line for their turns.


1.1 First Set of Evidence Against Illusion Theory for Gravity Hills

Notice that in Pictures 7 and 8, we cannot see the bottom of the strange slope from the area of vehicle
waiting line at the top of the strange slope. We can see the far end of this section of road but cannot see
the bottom in the middle of this section of road. I was standing upright on the top of the strange slope in
taking all these Pictures 1 to 8. My camera had at least 5 feet of clearance from the ground surface. Even
with such 5 feet of clearance at the area of waiting line of vehicles, my camera still cannot see the bottom
of the strange slope, but can see the far end of the road.

This is a strong evidence that the bottom of the strange slope in the middle of this section of road is
indeed lower than the top of the strange slope and lower than the far end such that we cannot see the
bottom from this waiting line of vehicles on the top of the strange slope. This is one of the reasons that I
do not believe that the strange gravity phenomenon on such strange slope is due to "Illusion" as asserted
by many people and by many articles on Internet.

The Illusion Theory asserts that: (1) the gravity at such gravity hill is normal (which implies that there is no
abnormal gravity at such location to produce the observed strange gravity phenomena.), (2) the perceived
bottom of such strange slope is higher than the perceived top of the slope, (3) those vehicles are rolling
downhill, and (4) all those vehicles that look like rolling "uphill" on such slope as shown on Pictures 2, 3, 4
and 5 are due to illusion in human perception..

If the perceived bottom of the slope were higher than the perceived top of the slope as asserted by the
"Illusion Theory", then we, at my standing upright position on the perceived top of the strange slope with
at least 5 feet of clearance above ground level, would be able to see the "higher" bottom from the area of
waiting line of vehicles in Pictures 7 and 8.

However, the fact that on the waiting line in Pictures 7 and 8, we do see the far end but do not see the
perceived bottom of the slope in the middle of this section of road is a strong evidence that (A) the bottom
of the slope in the middle is indeed lower than the top of the slope and lower than the far end as shown in
Pictures 2, 3, 4 and 5 and (B) this strange gravity phenomenon is real and is NOT due to illusion.  

More independent evidences against "Illusion Theory" including the problems in its measurements
supporting Illusion Theory are described in Sections 2, 3, 4 and 5 on this web page.

A picture taken by other people from the bottom of the slope looking toward the top of the slope can be
seen at the following website:

http://
www.forensicgenealogy.info/images/mag_hill_macton_reverse.jpg

This picture shows that this camera at the bottom of the slope cannot see the large area for the waiting
line of vehicles at the top of the slope beyond the instructor and the orange color post.

If the bottom of the slope were higher than the top of the slope, as asserted by the Illusion Theory, this
camera at the "higher" bottom would be able to see the large area of waiting line of vehicles beyond the
position of the instructors and the orange post.

The fact that this camera at the bottom cannot see the large area of waiting line of vehicles on the top of
slope is another evidence that the bottom of the slope is indeed lower than the top of the slope.  

Similarly, many other people have also taken movie clips when their cars in neutral gear were rolling up
this Magnetic Hill in Moncton  as shown on the following YouTube websites:

http://
www.youtube.com/watch?v=Ml6E45x825M&feature=related

http://www.youtube.com/watch?v=JLgdZGbOclk

http://www.youtube.com/watch?v=zhr0owdDLqo&feature=related

In these three movie clips, notice that when their cameras in their cars are pointing to the top of the slope
(where the instructors and the area for the waiting line of vehicles are located), the videos show that
these cameras cannot see the large area for the waiting line of vehicles on the top of the slope.

If the bottom of the slope were higher than the top of the slope, as asserted by the Illusion Theory, these
cameras in the cars would be able to see the large area of waiting line of vehicles beyond the position of
the instructors. The fact that these cameras cannot see the large area of waiting line of vehicles on the
top of the slope is another evidence that the bottom of the slope is indeed lower than the top of the slope.
 

Therefore, both the views in Pictures 7 and 8 from the area of the waiting line of vehicles on the top of the
slope and the views from the bottom of the slope consistently indicate that the bottom of the slope is
indeed lower than the top of the slope.
Picture 3: The vehicle started to roll up hill from the bottom.
Picture 4: The vehicle continued rolling up hill.
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讀萬卷書    行萬里路

Home                                                              About Author                                               Contact Author
11. Technical Background of the Author of This Web Page

Dr. Sing H. Lin is a retired Telecommunication engineer and manager with technical expertise in the area
of radio/wireless communication technologies and systems. He received his Ph.D. Degree in Electrical
Engineering from the University of California at Berkeley, California, USA in 1969 and BSEE degree from
National Taiwan University in 1963. He joined Bell Laboratories in New Jersey, USA in 1969. He has 68
technical publications and presentations in various technical journals and conferences, 3 patents, and a
Chinese certificate of a copyright on a mapping table for Chinese Spelling Code.

He had been a member of the US Delegation to International Telecommunication Union (ITU) for many
years in developing the global standards and recommendations for radio/wireless communications
systems including the Third Generation (3G) mobile wireless communications systems and beyond. In
1998, this international team of wireless technology experts, including Dr. Sing Lin, completed the
development of ITU standard for 3G mobile wireless communication system. This 3G wireless mobile
system standard provides the platform that spawned the rapidly growing smart phone industry with many
useful applications attracting huge number of users all over the world. The total global annual sales of
smart phones is about 500 million units in 2011 and is growing very fast. The smart phone industry is now
moving forward into the international 4G system standard which is also known as LTE (Long Term
Evolution).

Dr. Sing H. Lin and his colleagues in the old Bell Laboratories had conducted many years of experiments
on effects of multipath radio propagation and rain attenuation on the performance of terrestrial and
earth-satellite microwave communication radio links. Such experiments and huge amount of data were
collected from numerous microwave radio links in USA and in some foreign countries such as Saudi
Arabia. Results from such  experimental data, analyses and developed theories are important for
engineering microwave communication radio links to meet performance objectives. Some of these results
were published in the following technical papers:

S. H. Lin, H. J. Bergman and M. V. Pursley, "Rain Attenuation on Earth-Satellite Paths - Summary of
10-year Experiments and Studies," The Bell System Technical Journal, Vol. 59, No. 2, February 1980, pp
183 to 228.

S. H. Lin, "Statistical Behavior of a Fading Signal," The Bell System Technical Journal, Vol. 50, No. 10,
December 1971, pp. 3211 - 3270.

S. H. Lin, "Statistical Behavior of Deep Fades of Diversity Signals," IEEE Transaction on
Communications, Vol. COM-20, No. 6, December 1972, pp. 1100 - 1107.

By using Statistical Theory of Extremes, Dr. Sing H. Lin has also developed a theory and a method to
obtain nationwide long term (25 to 50 years) distributions of rain rate at more than 200 locations in USA.
Such theory and method are published in the following technical papers:

S. H. Lin, "Statistical Behavior of Rain Attenuation", The Bell System Technical Journal, Vol. 52, No. 4,
April 1973, pp. 557 - 581.

S. H. Lin, "Rain Rate Distributions and Extreme Value Statistics," The Bell System Technical Journal, Vol.
55, No. 8, October 1976, pp. 1111 - 1124.

S. H. Lin, "More on Rain Rate Distributions and Extreme Value Statistics," The Bell System Technical
Journal, Vol. 57, No. 5, May-June 1978, pp. 1545 - 1568.

Note: The technical papers in Bell System Technical Journal (BSTJ) from 1922 to 1983 are available
online in the following BSTJ website:

http://
www3.alcatel-lucent.com/bstj/

A complete list of his 68 technical publications and presentations in various technical journals and
conferences and of his patents is in his web page at:

http://www.shltrip.com/Patent_and_Publication.html

When he was a Ph.D. student in the University of California at Berkeley, he did take and enjoyed the
graduate course on Radio Astronomy. As a radio engineer in Bell Laboratories, in New Jersey, USA, he
participated in a team project on radiometer measurements and experiments as related to satellite
communication technologies. He learned the Dickie radiometer technologies from a team of radio
astronomers, including Robert W. Wilson, in Bell laboratories at Crawford Hill in Holmdel, New Jersey.

His interest in astronomy continues from his student life through his professional engineering life and into
his retiree life. In his retiree sightseeing trips, he enjoyed touring the Very Large Array (VLA) site
operated by the National Radio Astronomy Observatory near Socorro, New Mexico and the National
Solar Observatory and Apache Point Observatory on Sacramento Peak in New Mexico, USA in February
2006. More information on and a picture of Dr. Sing H. Lin are available at the following web page:

http://www.shltrip.com/aboutus.html

His e-mail address is: SINGHLIN@GMAIL.COM

He has retired from his professional Telecom engineer job and is living in New Jersey, USA.
Figure 1 for the Top and the Bottom of an uphill slope of a gravity hill.
Figure 2 - On a gravity hill, the plumb line and the level liquid bubble yield (wrong) tilted horizontal plane
due to the influence of abnormal gravity.
On Figure 2, as viewed from the Bottom of the gravity hill, the Top of the gravity hill becomes below the
tilted horizontal plane represented by the red dashed line. In other words, with the tiled red dashed plane
taken as the (wrong) reference horizontal plane, (1) the uphill slope becomes a downhill slope on Figure
2, and (2) the top of the slope becomes lower than the bottom of the slope because of the tilted wrong
reference horizontal plane.

Therefore, such land survey measurements or carpenter’s level measurements indicate erroneously that
the human perceived top is lower than the bottom of the gravity hill based on its tilted horizontal plane.
Such wrong measurement results are often used as the support for the illusion theory for gravity hills.

Although there are many reports on Internet of the results of such land survey measurements and
carpenter’s level measurements on gravity hills, I have not seen any reports of such measurements
indicating that the surveyor(s) took any special care to check to see if the gravity on the gravity hill is
normal or not before they performed such traditional land survey measurements.

Since those surveyor(s) did not check to see if the gravity at the gravity hill is normal or not and blindly
assumed that the tilted Red Dashed Plane in Figure 2 established by the plumb line and the level bubble
as the reference horizontal plane in all those land survey measurements, we cannot trust the results from
such blind measurements on gravity hills.

Many people miss the serious defects in such results from blind land survey measurements, and fall into
this trap of erroneously accepting such wrong results as valid proof of illusion theory for the strange
gravity phenomenon on these gravity hills. Consequently, we see the word "illusion" all over the place in
many articles on Internet when they refer to this strange gravity phenomenon on many gravity hills.

The bottom line is that one cannot trust the results from such blind measurements on gravity hills or
mystery spots unless special independent measurements have been done to check to see if the gravity
on such gravity hills or mystery spots is normal or not.

Some possible methods to check to see if the gravity on gravity hill or a mystery spot is normal or not are
described in the following web page:

http://
www.shltrip.com/Need_For_Precision_Measurements.html

6. GPS Measurements on Gravity Hill

In view of the serious problem of measurements based on plumb line or spirit/level bubble or water hose
on gravity hills described in Section 5, some people looked for other methods to measure the elevations
of the top and the bottom on a gravity hill. One of the possible candidate methods is the use of GPS
(Global Positioning System) receiver which may not be influenced by the potential local abnormal gravity.
It was thought to be a better method for measurements of the elevations of the top and the bottom of a
gravity hill.

6.1. Contradictory Results from GPS Measurements on a Gravity Hill

Two investigators had done two such sets of independent measurements by using GPS receiver on a
gravity hill known as the Gravity Hill near New Paris in Bedford County in Pennsylvania, USA.

However, the results from these two independent measurements using GPS receiver on the same gravity
hill are totally opposite and contradictory.

Results of Investigator (X) indicate that the lowest point by visual perception on this section of road at
Gravity Hill is higher than the highest point by visual perception and conclude that the strange
phenomenon at this Gravity Hill is due to illusion.

But the independent second set of measurements by GPS from investigator (Y) indicates that the lowest
point and the highest point by visual perceptions on this strange slope at Gravity Hill are indeed correct as
confirmed by his GPS measurements. The conclusion from investigator (Y) is that this strange
phenomenon at the Gravity Hill is real and is NOT an illusion.

The key reason for such contradictory results from GPS measurements is due to the large and time
varying error in elevation measurements by using a single consumer-grade inexpensive GPS receiver as
described in the next Section.

6.2. Poor Accuracy of Consumer-Grade Single GPS Receiver for Elevation
Measurements

According to the website of a major supplier, Garmin, of GPS receivers at:

http://
www.garmin.com/aboutGPS/

The error of the basic, older version of single consumer-grade GPS receiver is about 15 meters (50 feet)
on average which is not good enough for our purpose of measurements on these strange slopes because
the difference between the high point and the low point may be only 10 to 15 feet on these strange
slopes.

The use of newer Differential GPS (DGPS) single receiver that includes correction signal from land-based
broadcasting stations may achieve an accuracy of 3 to 5 meters (10 to 16 feet).

Furthermore, the newer GPS single receiver that includes the correction signal from the WAAS (Wide
Area Augmentation System) coming from geostationary satellite broadcast, may improve the accuracy to
better than 3 meters (10 feet) on average. Furthermore, a long list of various sources of errors in GPS
measurements is given at the end of the web page above.

However, these accuracy numbers are referring to the navigation position on the horizontal plane. It says
that at least three GPS satellites must be visible to the GPS receiver in order to determine the horizontal
position, but at least four GPS satellites must be visible to the GPS receiver in order to determine the
elevation. This implies that the elevation measurements are more vulnerable to errors.

Information on some other websites on GPS indicates that the accuracy in elevation measurements may
be worse than those on horizontal plane by about a factor of 3. Such large error in elevation
measurements makes the accuracy of elevation measurements by single consumer-grade GPS receiver
on such gravity hill highly questionable.

These GPS accuracy numbers are usually given as "on average" which means that the measurement
error is time varying depending on several factors listed near the bottom of the Garmin website given
above. For example, one of such factors is called Geometrical Dilution of Precision that can degrade the
precision in certain cases. This happens when several of the orbiting GPS satellites seen from the GPS
receiver are in a similar (angular) position relative to the receiver. It makes the precision much worse than
if the seen satellites have equal angular spacing over the sky.

The 24 GPS satellites are moving rapidly on their orbits and their relative positions, as seen from a GPS
receiver, vary rapidly because these satellites are not on high orbits of synchronous satellites. Such rapid
variations in their relative positions viewed from a GPS receiver result in rapidly time varying
measurement errors.

I did a test personally by holding an old GPS receiver at a fixed location and just watch the measured
elevation displayed on the GPS receiver screen. The displayed elevation is not constant but is time
varying every few seconds and may vary by as much as 100 feet even though the GPS receiver is not
moving at all. All such variations are due entirely to the time varying measurement error.

Furthermore, I put two consumer-grade GPS receivers, of identical model from the same manufacturers,
side by side with no space between the touching sides of the two GPS receivers. The measured
elevations displayed on the two identical GPS receivers at the same location are different!

Furthermore, the crystal oscillator frequency and the clock in GPS receiver may be affected by the
abnormal gravity in mystery spots and gravity hills through the gravitational time dilation effect described
in Section 4.1. Strange behavior of GPS navigators in mystery spots have been reported in the following
website:

http://
www.shltrip.com/Additional_Information_On_Gravity_Hills.html

This effect of gravitational time dilation may be another possible contributing factor to the measurement
error using GPS receivers.

The bottom line is that the accuracy of using a single consumer-grade GPS receiver is not good enough
for accurate determination on which end of the slope of a gravity hill is higher.

7. Is It Magnetic Force or Electric Force?

The following observations and tests on several gravity hills at several different places indicate that the
strange phenomenon on gravity hills is not due to magnetic force and not due to electric force.

(i) People poured water on several gravity hills and the water flew uphill on such strange slopes. Some
other people put plastic water bottle with water on such strange slopes and the plastic water bottle rolled
uphill on such strange slopes. They are shown on the movie clips in the following YouTube websites:

http://
www.youtube.com/watch?v=e2hAiM2yjso&NR=1

http://www.youtube.com/watch?v=XFqsdpCB-O8&feature=related

http://www.youtube.com/watch?v=jd0A4bnp-YU&feature=related

http://www.youtube.com/watch?v=0Qscv5ei29Q&NR=1

(ii) Two plumb lines, with an iron ball on one line and a plastic ball on another line, are parallel to each
other on a strange slope in China, and

(iii) Tests by using a compass on a strange slope in China showed no unusual magnetic force. Some
other measurements of magnetic field in some mystery spots in California, USA indicate that the strength
of magnetic field inside the mystery spots in higher by several percents relative to normal magnetic field
outside of the mystery spots. However, abnormal magnetic field a few percent higher than the normal
earth magnetic field is not strong enough to pull a vehicle in neutral gear and brake released to roll uphill.

8. Many Other Locations with Similar Strange Gravity Phenomenon

In addition to the Magnetic Hill near Moncton in eastern Canada described in Section 1 and several
coastal gravity hills described in Section 2, there are hundreds of other similar gravity hills all over the
world. There are names like gravity hill, antigravity hill, Confusion Hill, magnetic hill, magic hill, Mystery
Hill, Magnetic Spot, Electric Brae, spook hill, strange slope, etc. being used for such gravity hills. Please
see the descriptions and the long list at the following websites:

http://
en.wikipedia.org/wiki/List_of_magnetic_hills

http://userpages.umbc.edu/~frizzell/gravhills.html

http://www.edu-observatory.org/physics-faq/General/roll-uphill.html

http://www.forensicgenealogy.info/contest_362_results.html

There are also many movie-clip reports on YouTube website of many gravity hills at many places all over
the world. Some samples are at the following website:

http://
www.shltrip.com/Many_Video_Reports_On_YouTube.html

9. What is the Source for Abnormal Gravity on Gravity Hills and Mystery Spots?

9.1. Discovery Process

The six evidences described in Sections 1 to 4 and the understanding of the serious defects in those land
survey measurements supporting Illusion Theory convince me that (1) The observed strange gravity
phenomena and mysteries on those gravity hills and Mystery Spots are not due to illusion in human
perception, and (2) Such observed strange gravity phenomena and mysteries are real and are caused by
significant abnormal gravity at those special locations.

The next logical question is what is the source for such significant abnormal gravity at those gravity hills
and Mystery Spots?

(A)Those six evidences against Illusion Theory, (B) The understanding of serious defect in those land
survey measurements on gravity hills supporting Illusion Theory and (C) Careful study of the details of the
behavior of those strange gravity phenomena and mysteries reported on Internet have been guiding my
21-year research and in-depth thinking on this important question into the discovery of the dark matter
based theory and the associated model for the strange gravity phenomena and mysteries on those
gravity hills and in those Mystery Spots.

Doing research at the forefront of science is quite challenging and difficult. This web page has been
revised many times in last few years signifying that the research process into this important discovery is
not a simple straight forward path, but has been a difficult zigzag path that gradually zero-in on to the
target.

9.2. Dark Matter Based Theory and Model

This discovered dark matter based Theory and Model indicate that the source for such abnormal gravity
is a very compact nugget of dark matter with extreme high mass density that is at least 1,000 times
greater than that of average ordinary material on earth surface.

However, our familiar ordinary matters on earth do not have the necessary extreme high mass density
and are not able to produce the significant abnormal gravity at the locations of those mystery spots and
hundreds of gravity hills all over the world.

On the other hand, a well known characteristic of dark matter is that dark matter does not interact with
our familiar ordinary matter in any force except gravity. This characteristic seems to indicate that the
compact nugget of dark matter cannot stay at the location of a gravity hill (or a mystery spot) steadily for
many years as the source of the strange gravity phenomena observed at the location of the gravity hill (or
the mystery spot) because the earth gravity will suck such compact nugget of dark matter into the center
of the earth. This problem stimulated my thinking into the following more sophisticated model of dark
matters trapped and anchored in earth's gravity well.

The compact nugget at the location of a gravity hill (or a mystery spot) is not a solid rigid nugget but
consists of many loose sand particles of dark matter with extreme high mass density. This compact
nugget is supported by two streams of loose sand particles of dark matters. One stream is being sucked
from the compact nugget into the center of earth by earth gravity, then over-shoots and keeps going to
the conjugate point on the opposite side of earth surface. The other stream is also being sucked from the
conjugate point into the center of earth by earth gravity, then over-shoots and keeps going back to the
original location of the gravity hill (or the mystery spot).

In other words, these loose sand particles of dark matter are trapped in the gravity well (gravity field) of
the earth and are oscillating between the gravity hill (or the mystery spot) and its conjugate point on the
opposite side of earth surface.

This dark matter based Model provides scientific explanation for all observed strange gravity phenomena
and mysteries in the known mystery spots and hundreds of gravity hills all over the world.

9.3. More Details

Details of the logical steps and the necessary supporting information leading into such discovery are
described in my companion web page at:

http://
www.shltrip.com/Oregon-Vortex.html

The dark matter's gravity anchor in the earth's gravity well is also described in the companion web page
above.

10. Concluding Remark

This 21-year study produced a scientific explanation for the long standing puzzle on the observed strange
gravity phenomena and mysteries at several mystery spots and hundreds of gravity hills all over the
world. It also helps us taking one more step forward in our understanding of the characteristics and the
behavior of the mysterious dark matters.

This model implies that those loose sand particles of dark matter have been oscillating in the earth’s
gravity well for billions of years since earth was formed billions of years ago. The long lasting oscillation
of dark matter particles in earth's gravity well and the existing 10 year results from deep underground
collision experiments seem to indicate consistently the preliminary finding (A) that there is practically no
collision between dark matter particles and our familiar ordinary matters.

However, several more advanced deep underground collision experiments with much higher sensitivity
have started or will be starting soon. Future results from such more advanced experiments with much
higher sensitivity will help to determine if the preliminary finding (A) is correct or not. In case if the
preliminary finding (A) is proven to be correct by these more advanced experiments, then it raises serious
questions on (B) why there is no collision between dark matter particles and ordinary matters at all? and
(C) Are dark matters in our familiar 4-dimensional space or are dark matters on higher dimensional space
or in parallel universe?

In this sense, these more advanced collision experiments with much higher sensitivity may become part of
important experiments to determine if dark matters are in our familiar 4-dimensional space or in higher
dimensional space or in parallel universe.

Those hundreds of known locations of gravity hills and mystery areas on earth surface may become "gold
mines" in the near future for intensive close up scientific investigations on the characteristics of dark
matters.