You can believe what you want religiously. Religion is one thing, but science, provable science, is something else.

I really believe in science. It is a faith. It is a reverence akin to religion. But as we always say, it's different from religion in that, as near as we can tell, it exists outside of us. It has an objective quality, the process of science.

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.

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.

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.

Science is the key to our future, and if you don't believe in science, then you're holding everybody back.

Science is the best idea humans have ever had. The more people who embrace that idea, the better.

After I had this idea to be Bill Nye the Science Guy, I wore straight ties the first couple times, and then I got this thing going and I started wearing bow ties.

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?

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.

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.

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.

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

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.

To try to really land a spacecraft really on another world is really difficult, and if we lose that ability, it's going to be heartbreaking.

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

Humor is everywhere in that there's irony in just about anything a human does.