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.

In literature classes, you don't learn about genes; in physics classes you don't learn about human evolution. So you get a fragmented view of the world. That makes it hard to find meaning in education.

Dune is the bestselling science fiction book of all time. It's something you really need to read in your lifetime. If you're going to read The Lord of the Rings, which everyone should, then you have to read Dune, too.

The true science and study of man is man.

In history class, I wrote a poem, 'The Royalists and the Roundheads.' I would write poems about driftwood in art class and little stories about the sun, moon, and stars in science class. Since not many kids were writing in class, I got away with it.