But investment in space stimulates society, it stimulates it economically, it stimulates it intellectually, and it gives us all passion.

For me, the meaning of life is pretty clear: Living things strive to pass their genes into the future.

There really is no such thing as race. We all came from Africa. We are all of the same stardust. We are all going to live and die on the same planet, a Pale Blue Dot in the vastness of space. We have to work together.

Hard to find anything lovelier than a tree. They grow at right angles to a tangent of the nominal sphere of the Earth.

The most serious problem facing humankind is climate change.

Bicycling is a big part of the future. It has to be. There's something wrong with a society that drives a car to work out in a gym.

I used to play ultimate Frisbee, and I just got a reputation for making popcorn at parties. I don't mean to brag on myself, but I make the popcorn in the pot, and it comes out fine every time.