All things with mass bend space-time. Something tiny has very small gravity. Something huge, like a planet, really bends space. You can jump up in the air, which is like climbing out of the well made by the planet bending space-time. Since you don't have continuous velocity, you come back to earth. Gravity is a weak force because you can pick up a nail with a magnet and gravity doesn't prevent it. Magnetism is a stronger force. And I don't look at gravity as something with mass pulling you towards it, but rather the rest of the universe is pushing you towards it.
unfortunately general relativity (inc. mass bending spacetime) doesn't seem to be easily frameable in terms of quantum mechanics, so one of those theories likely has to be an approximation of something deeper, if not something entirely different.
Why did you start a new thread? You should have posted here. http://sportstwo.com/threads/227254-The-World-is-Upside-Down...?
Some good science answers and some bs. Particles don't "feel" gravity. They interact. Gravity, incidentally, is the weakest of the four basic "forces", in quotes because the word "force" does not really accurately describe them (gravity, electromagnetic, strong nuclear, weak nuclear) but it is the one "macro" objects like animals, plants, people, planets et al are most familiar with because it is the only one that can work at long distances. Actually we also experience the other three but we are not aware of the protons in the atoms in our bodies (strong nuclear) or how the atoms hold together (electromagnetic) or how they decay (weak nuclear). Mental decay, OTOH, is VERY familiar to anyone who reads web sites....
I disagree I can feel the EM force right now as my fingers don't go through the keyboard. I was just trying to a wise ass and bring up gravitons and higgs bosons.
