You stop planetary exploration, those people who do that extraordinary work are going to have to go do something else.
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?
By the way, most of the light that comes from the sun is green.
The Big Bang banged, and for some reason we’re here. And that’s astonishing. And that we can understand that, that’s the most astonishing.
If the Earth gets hit by an asteroid, it’s game over. It’s control-alt-delete for civilization.
Climate change is a real deal. So, hey deniers – cut it out, and let’s get to work.
Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.
If you want grown-ups to recycle, just tell their kids the importance of recycling, and they’ll be all over it.
When we sit down to draw or paint the sun’s rays, we generally use yellow because in the morning and the evening with the blue light scattered away so strongly you’re left with a little bit of red and it comes out yellowish.
Winter lingered so long in the lap of Spring that it occasioned a great deal of talk.
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.
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.
What happens to other species also happens to us.
My father was a very good Boy Scout. He was very skilled with knots, and he showed me how to tie a bow tie.
How did we let an ideological resistance to inquiry become such a prominent part of our society?
Teaching creationism in science class as an alternative to evolution is inappropriate.
From an evolutionary standpoint you can’t just wipe everything out and start over, and I don’t think you can do it in the school system either.
When we explore the cosmos, we come to believe and prove that we can solve problems that have never been solved. It brings out the best in us. Space exploration imbues everyone with an optimistic view of the future.
There really is no such thing as race...
Recommending or insisting on abstinence has been completely ineffective.