The thing about a theory in science is it allows you make predictions. Evolutionary theory allows us to predict what apples will taste good next harvest.

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

The US Navy has several people on every ship that can navigate by the stars. They don't fool with that.

When we see the shadow on our images, are we seeing the time 11 minutes ago on Mars? Or are we seeing the time on Mars as observed from Earth now? It's like time travel problems in science fiction. When is now; when was then?

Science is the best thing humans beings have ever come up with. And if it isn't, science will fix it.

People get a lot out of being religious. They have strong senses of community and mutual support. So, what's not to love [there]?

Our goal in science is to discover universal laws of nature. That pursuit fills me with wonder.