One is always a long way from solving a problem until one actually has the answer.

The fact that no one understands you doesn't mean you're an artist.

It [AI] would take off on its own and redesign itself at an ever increasing rate. Humans, who are limited by slow biological evolution, couldn't compete and would be superseded.

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.

It should soon be possible dramatically to increase the intelligence and life span of a few individuals. They and their offspring could become a master race. Evolution pays no regard to social justice. It was not fair on the Neanderthals they were replaced by modern humans.

Observations indicate that the universe is expanding at an ever-increasing rate. It will expand forever, getting emptier and darker. Although the universe doesn’t have an end, it had a beginning in the Big Bang. One might ask what is before that but the answer is that there is nowhere before the Big Bang just as there is nowhere south of the South Pole.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!