We don't know that. That's just a common theory that holds a tiny bit more evidence. I once followed the idea of Nadril. If you didn't believe in gravity, it would be gone. Oh, wait, I still do. See you guys 200 feet in the air! :twss: We all believe in gravity, I'm just asking WHAT is it, what it made off, why, how, where the energy ect... It's obvious gravity exists, it just that it so danm hard to explian