The "Powers That Be" are not smart enough to engineer Armageddon, but they may yet be stupid enough. If governments are involved in covering up the knowledge of aliens, then they are doing a much better job of it than they seem to do at anything else.

Any physical theory is always provisional, in the sense that it is only a hypothesis: you can never prove it.

If the government is covering up knowledge of aliens, they are doing a better job of it than they do at anything else.

We waste time, so you don't have to.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Simplicity is a matter of taste

Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space.