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en.wikipedia.org/wiki/Gravity

Gravity, or gravitation, is a natural phenomenon by which all things with mass are brought toward (or gravitate toward) one another, including planets, stars and galaxies. Since energy and mass are equivalent, all forms of energy, including light, also cause gravitation and are under the ...

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

The particular advantage of this theory of gravity (General Relativity) is that it ... the distortion of space-time caused by the presence of the earth accelerates your  ...

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

Aug 10, 2007 ... Science can measure gravity, but its source eludes discovery.

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

Dec 5, 2013 ... Because of gravity, we fall down (not up), objects crash to the floor, and ... the mass of an object causes the space around it to essentially bend ...

helios.gsfc.nasa.gov/qa_gp_gr.html

My friend thinks gravity is caused by the Earth spinning, and I think it is caused by the Earth weighing so much we ...

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

Jan 24, 2012 ... We know gravity exists because of what doesn't happen. ... Gravity is the force that gives weight to objects and causes every particle to be ...

www.space.com/32147-why-is-gravity-so-hard-to-understand.html

Mar 3, 2016 ... [Greatest Mysteries: What Causes Gravity?] And since matter and energy are two sides of the same special-relativistic coin — just as space and ...

www.ask.com/youtube?q=What+Causes+Gravity%3F&v=Juz12LAVtUI
Sep 29, 2016 ... Gravity.

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

Apr 25, 2017 ... Gravity is the force of attraction between all matter. Although gravity exists for even small amounts of matter, the force is usually not significant ...

www.thenakedscientists.com/forum/index.php?topic=9197.0

what i mean is that is it caused by the earth's spinning motion?? or what? if not than what causes the earth to spin?? why is it spinning??