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.

If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.

In another couple centuries I'm sure that worldview won't even exist. There's no evidence for it.

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.

America has had many other discoverers besides Columbus, but he seems to have made more satisfactory arrangements with the historians than any of the others.

Burning carbon-based substances like oil, gas, and especially coal, produces billions of tons of extra carbon dioxide each year. Methane gas from cows and pigs and other animals on our large farms ends up in the atmosphere as well, trapping more of the sun's energy as heat.

Religion is a completely different thing from the claim that the Earth is six thousand years old. That's just crazy.