This is really bothering me... (Physics)

[TracyCoxx]

Originally Posted by Tread

What is possible and not in astronomic dimensions, is a bit like to speculate. We know nearly 5% of the composition of the universe, the visible matter. No one realy know what dark energy and dark matter is, but in the currently theories they must exist. Even the origin of mass is unknown. It must be the higgs boson, but it's never proven.
There are more questions about the universe then answers.

True, but that's off the topic. The original thread was about "Thoughts on UFO's" and the answers we have are relevant to such things like, are aliens constrained by the speed of light? Can they use wormholes? Would using other dimensions allow them to get here any quicker? This thread was created because Breezy doubted what was being said.