: Does anybody know about theories in antigravity?

It is a week force. Everything I read about an antigravity device involves electromagnetism. Resulting effects may be the similar, but the source is very different between the two, besides which electromagnatism is a strong force. Sinse it is more like light, which is also a weak force, I invision something more like a reflecting device. We created mirrors long before we understood the nature of light, which is still under some debate. So perhaps it is possible to create a gravity reflecting device before fully understanding it, which would show the most effect on the largest, nearest, body, like a person using the device to reduce the earths gravity, and create the effect of levitating...(reduction of gravity + centrifical spin working to throw us out in space) Anyone aggree or disagree? : Any thoughts on this? ... or theories?