Science provides a much more satisfactory way to seek answers than does any religion.

Science is the key to our future, and if you don't believe in science, then you're holding everybody back.

To leave the world better than you found it, sometimes you have to pick up other people's trash.

Anybody who grew up with the space program is a fan of science fiction.

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

Not wasting any water bottles is good. Not leaving the lights on is good. Turning the thermostat down in the winter, up in the summer, is good. But the best thing any of us in the developed world, especially in the United States, can be doing is talking about it.

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.