Follow the evidence wherever it leads, and question everything.

One trait stands out in nearly all meteorites: metal; they've got it. So, the best way to find a meteorite is to hear it first.

I don't have an issue with what you do in the church, but I'm going to be up in your face if you're going to knock on my science classroom and tell me they've got to teach what you're teaching in your Sunday school. Because that's when we're going to fight.

All the traditional STEM fields, the science, technology, engineering, and math fields, are stoked when you dream big in an agency such as NASA.

I can't tell you how many people say they were turned off from science because of a science teacher that completely sucked out all the inspiration and enthusiasm they had for the course.

If your ego starts out, "I am important, I am big, I am special," you're in for some disappointments when you look around at what we've discovered about the universe. No, you're not big. No, you're not. You're small in time and in space. And you have this frail vessel called the human body that's limited on Earth.

The greatest teachers are the ones that turn a B student into an A student, or a failing student into a B student.