Science is the key to our future, and if you don't believe in science, then you're holding everybody back.
Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.
The more you find out about the world, the more opportunities there are to laugh at it.
Humor is everywhere in that there's irony in just about anything a human does.
There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.
Evolution is the fundamental idea in all of life science - in all of biology.
The information you get from social media is not a substitute for academic discipline at all.
If you want grown-ups to recycle, just tell their kids the importance of recycling, and they'll be all over it.
Science is the best idea humans have ever had. The more people who embrace that idea, the better.
Science rules!
There is good evidence that Venus once had liquid water and a much thinner atmosphere, similar to Earth billions of years ago. But today the surface of Venus is dry as a bone, hot enough to melt lead, there are clouds of sulfuric acid that reach a hundred miles high and the air is so thick it's like being 900 meters deep in the ocean.
Everybody who's a physician, who makes vaccines, who wants to find the cure for cancer. Everybody who wants to do any medical good for humankind got the passion for that before he or she was 10.
NASA is an engine of innovation and inspiration as well as the world's premier space exploration agency, and we are well served by politicians working to keep it that way, instead of turning it into a mere jobs program, or worse, cutting its budget.
I like to regard myself as someone who's capable of critical thought, that is to say, who can evaluate claims.
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?
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.
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.
I hope climate science becomes the big thing. And then what I want is electrical engineers to solve the world's energy problems, energy distribution problems. I want mechanical engineers to make better transportation systems. I want chemical engineers to develop better solar panels, and so on.
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 look back on all the teachers that you liked, I am sure you will find they were very entertaining.
