[Getready]

How come all those wormholes...gravity waves etc...are out there....why arent they here...or at least locally? Could there be nano or femto black holes on earth?

[Telepathic Intruder]

Wormholes are purely hypothetical, and most likely don't exist at all. In fact it's very likely that they're very impossible. Gravity waves are another issue, and predicted by Einstein in his theory of general relativity. They do exist locally, but only as minor effects. Like all things that radiate, they follow the inverse square law meaning they're very weak at our distant location from the source of them. Gravity waves occur near mind bogglingly violent locations in the universe, if you include only the noticeable ones. Technically, a gravity wave occurs everywhere that matter is unevenly distributed while in motion, like when you breathe or snap your fingers. But supernovae, quasars, close orbiting binary neutron stars, and colliding black holes do this with cosmic mastery.

Micro black holes were predicted by Hawking, but none have been discovered. I don't know what a femto black hole is, if not just smaller.