By the way, most of the light that comes from the sun is green.

The information you get from social media is not a substitute for academic discipline at all.

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.

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.

The most serious problem facing humankind is climate change.

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

If you meet somebody who says he or she has never dreamed of flying, I don't believe you. I mean, they're lying.