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www.livescience.com/1770-greatest-mysteries-gravity.html

Greatest Mysteries: What Causes Gravity? ... Xavier Siemens, a gravitational theorist at the University of Wisconsin Milwaukee, said showing gravity acts like a wave needs to happen first.

www.math.ucr.edu/home/baez/physics/Relativity/GR/gravity.html

[Physics FAQ] - By Martin Hogbin, 1998. What causes Gravity? One of Einstein's old tutors, a man by the name of Minkowski showed that the special theory of relativity could be expressed in an interesting way.

www.universetoday.com/75705/where-does-gravity-come-from

Gravity. The average person probably doesn’t think about it on a daily basis, but yet gravity affects our every move. Because of gravity, we fall down (not up), objects crash to the floor, and ...

www.reference.com/science/causes-gravity-d27f4a92d605be96

As of 2014, science remains uncertain about what causes gravity, which is the attraction between two bodies. However, one theory is that small particles called gravitons are responsible for the force. Scientists continue to search for gravitons and gravitational waves to further the understanding of gravity's cause.

en.wikipedia.org/wiki/Gravity

Gravity (from Latin gravitas, meaning 'weight'), or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light —are brought toward (or gravitate toward) one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.

sciencing.com/causes-gravity-earth-8579888.html

And in truth, physicists have little idea of what ultimately "causes" gravity, any more than they can tell any of us why the universe exists in the first place. Physicists have, however, produced equations that describe what gravity does exceptionally well, not just on Earth but throughout the cosmos.

science.howstuffworks.com/environmental/earth/geophysics/question232.htm

So what do we know about gravity? We know that it causes any two objects in the universe to be drawn to one another. We know that gravity assisted in forming the universe, that it keeps the moon in orbit around the Earth, and that it can be harnessed for more mundane applications like gravity-powered motors or gravity-powered lamps.. As for the science behind the action, we know that Isaac ...

www.dailyherald.com/article/20120124/news/701249876

We know gravity exists because of what doesn't happen. When we wake up we're still in our beds, not floating near the bedroom ceiling. Gravity is the force that gives weight to objects and causes ...

www.spaceplace.nasa.gov/what-is-gravity

What is gravity? Gravity is the force by which a planet or other body draws objects toward its center. The force of gravity keeps all of the planets in orbit around the sun. What else does gravity do? Why do you land on the ground when you jump up instead of floating off into space? Why do things fall down when you throw them or drop them?

www.quora.com/What-causes-gravity-Do-matters-properties-have-anything-to-do...

What causes gravity has finally been discovered and is no longer a mystery. We start with action-at-a-distance basics. In order to explain action-at-a-distance you absolutely need an elongated, extended PHYSICAL mediator. Otherwise, the proponent ...