Most of the intelligence out there must be artificial intelligence. We keep looking for critters like us living on a planet like ours, where in fact the majority of the intelligence out there is not biological. That would be my argument.

In archaeology, context is the basis of many discoveries that are imputed to the deliberate workings of intelligence. If I find a rock chipped in such a way as to give it a sharp edge, and the discovery is made in a cave, I am seduced into ascribing this to tool use by distant, fetid and furry ancestors.

Our brains are continuing to evolve, and perhaps a few tens of thousands of years from now, our descendants will walk around with five pound brains, allowing them insights that we can't imagine.

While it may be disappointing, I have to confess to people who ask for my insights on the meaning of it all that astronomy doesn't provide any clearly useful data on matters of sin and souls.

It's time to let science and medicine, not politics and rhetoric, lead us to good, sound policy.

I think a lot of kids get scared by 'E.T.' Sometimes when I do the science-fiction conventions, I'll have a 35-year-old guy with tatts and piercings all over, and he comes up and says, 'You know, it scared me so much I still can't watch it.'

I faced a certain amount of violence. It taught me that I had to learn to protect myself - and it made me stronger. It could have made me step backwards with my self-discovery. Instead, it pushed me further.

God created the world; the laws of nature were created by God. True science tries to find out what God put in the world. The trouble is where scientists speculate about theology and they don't know what they're talking about because they weren't there. They can't speculate about the origins of life because they weren't there.