Gravity doesn't exist. It's a made up force to explain how everything sticks to a round ball spinning in space at 1000 mph. That's why they call it a theory. Although even if it was real, it still wouldn't explain everything because there would be so many contradictions of the laws of physics. For instance, if gravity was so strong that it kept the seas and oceans glued to the surface of Earth, then how is a butterfly able to float.? That kind of force would smash the butterfly to smithereens. Or for that matter, how would we be able to walk, or even stand up, with that kind of downward pressure. Gravity would also have to be a stronger force than a vacuum. It's the only way to explain how a vacuum can suck a boiled egg through a soda bottle top one tenth its size, but not strong enough to rip the atmosphere from the Earth.