You cannot study other planets without referring to Earth and without applying the techniques and the insights of Earth science. And you cannot really do a good job understanding the Earth without the insights from planetary exploration.

When you think about alien intelligences making art, you then have to think about what art is and how bound up it is in the nature of consciousness. Why do we make art? And what can we expect to have in common with other creatures in universe?

Among the radio astronomers of SETI - the Search for Extraterrestrial Intelligence - it's only sort-of a joke that the true hallmark of intelligent life is the creation of radio astronomy.

Why should we consider defining intelligence as something global and as something that hasn't actually yet appeared on Earth? It may be useful for envisioning the future of our own civilization and any others that may be out there among the stars. It might give us something to strive for.

I wasn't with Joseph, but I believe him. My faith did not come to me through science, and I will not permit so-called science to destroy it.

Writing a screenplay's not rocket science, but I was in a bar, and the bartender came up to me and said, 'I saw 'Night at the Museum,' and the thing about him and his kid brought me and my kid together.' Something like that... it's like, 'Oh, right. That's why we're doing it.'

Physics is about questioning, studying, probing nature. You probe, and, if you're lucky, you get strange clues.

The thrill of science is the process. It's a social process. It's a process of collective discovery. It's debate, it's experimentation and it's verification of claims that might be false. It's the greatest foundation for a society.