One of the most significant events in our distant past is still perhaps the greatest mystery: the origins of life itself.

I can't think that leaving Earth once is enough.

Science is a philosophy of discovery; intelligent design is a philosophy of ignorance... Something fundamamental is going on in people's minds when they confront things they don't understnd.

One trait stands out in nearly all meteorites: metal; they've got it. So, the best way to find a meteorite is to hear it first.

In any city with lots of skyscrapers, lots of skyline, the moon seems bigger than it is. It's called the moon illusion.

The more of us that feel the universe, the better off we will be in this world.

On some issues, I'm a staunch Conservative — like curtailing greenhouse gas emissions so that we can Conserve the environment.