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?

I've always loved airplanes and flight. The space program was really important to me as a kid. I still have a photo of Armstrong and Aldrin on the moon in my living room.

Winter lingered so long in the lap of Spring that it occasioned a great deal of talk

Our world is driven by our remarkable ability to carefully measure and divide units of time. In a reasonable sense, the invention of clocks has had a greater effect on our lives than the invention of wheels. You can invent wheels relatively easily, if you live where trees fall over.

My dad was fascinated with sundials. He photographed hundreds of them and wrote a book about them. He designed a Nye family dial that kept time at our house in Washington, DC.

We talk about the Internet. That comes from science. Weather forecasting. That comes from science. The main idea in all of biology is evolution. To not teach it to our young people is wrong.