“Gravity is a particle? Please provide evidence to support your contention.”
http://en.wikipedia.org/wiki/Graviton
http://curious.astro.cornell.edu/question.php?number=535
http://scienceworld.wolfram.com/physics/Graviton.html
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TJK-4FB9FRP-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=8e62691fe0a5083267999c7d776fc558
Forces are not particles, but they are mediated by particles. Which is what I said, and not what you misquoted.
Your inability to see gravity does not make it unobservable. You cannot see radio waves, nor can you detect them without instruments, but they are the same phenomena as visible light.
Gravitons are postulated because of the great success of the quantum field theory (in particular, the Standard Model) at modeling the behavior of all other forces of nature with similar particles: electromagnetism with the photon, the strong interaction with the gluons, and the weak interaction with the W and Z bosons. In this framework, the gravitational interaction is mediated by gravitons, instead of being described in terms of curved spacetime as in general relativity. In the classical limit, both approaches give identical results, which are required to conform to Newton's law of gravitation.[4][5][6]
You have in no way demonstrated that they do, in fact, exist as particles.
You cannot see radio waves, nor can you detect them without instruments, but they are the same phenomena as visible light.
Yes, radio waves are. They are part of the electromagnetic spectrum.
Are you saying, then, that gravity is part of the electromagnetic spectrum?
She said it wasn't material. Try to stay on task.