If the Earth gets hit by an asteroid, it's game over. It's control-alt-delete for civilization.

I've got no problem with anybody's religion. But if you go claiming the Earth is only 10,000 years old, that's just wrong.

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

Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

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.

But as the cerebellum degrades with age, so does the quality of memories. The memories are there, but they're not as good.

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.