I would like to believe that crop circles are evidence of visitation. But there have been too many people who have admitted to creating these crop circles, and too many people who have shown how to make one on TV programs, so I have my doubts.

My point is, no one can stop the Internet. No one can stop that march. It doesn't mean that it's going to be smooth, though.

What we usually consider as impossible are simply engineering problems... there's no law of physics preventing them.

I am a figure skater, which helps me appreciate Newton's theory of mechanics.

Scientists who have dedicated their lives to building machines that think, feel that it's only a matter of time before some form of consciousness is captured in the laboratory.

No one knows when a robot will approach human intelligence, but I suspect it will be late in the 21st century. Will they be dangerous? Possibly. So I suggest we put a chip in their brain to shut them off if they have murderous thoughts.

We're in 'Jurassic Park' territory. If we go to the zoo in the future, we'll have zoos for extinct animals.