All kids are born geniuses, but are crushed by society.

Growing new organs of the body as they wear out, extending the human lifespan? What's not to like?

Sooner or later, we will face a catastrophic threat from space. Of all the possible threats, only a gigantic asteroid hit can destroy the entire planet. If we prepare now, we better our odds of survival. The dinosaurs never knew what hit them.

Robots may gradually attain a degree of 'self-awareness' and consciousness of their own.

I hope we find evidence of dark matter in the lab and in outer space. This would go a long way to proving the correctness of string theory, which is what I do for a living. That is my day job. So string theory is a potentially experimentally verifiable theory.

Scientists are embarrassed by science fiction; they want to distance themselves as much as possible. ... I think there's nothing to be ashamed of [and that] we should take science fiction seriously.

Once confined to fantasy and science fiction, time travel is now simply an engineering problem.