The people talking on their cell phone and following GPS instructions to where grandma's house is saying I don't need space - excuse me, that's how you know where grandma lives, and when to make the left turn.

We hunger for significance, for signs that our personal existence is of special meaning to the universe. To that end, we’re all too eager to deceive ourselves and others, to discern a sacred image in a grilled cheese sandwich or find a divine warning in a comet

As a citizen, as a public scientist, I can tell you that Einstein essentially overturned a so strongly established paradigm of science, whereas Darwin didn't really overturn a science paradigm.

There is no true understanding of Biology without Chemistry. And there's no true understanding of Chemistry without Physics.

With no gravitational force to work against, your body not only doesn't need the same amount of muscle and bone, it starts breaking them down. As on Earth, so in space: use it or lose it. And exercise may not solve the problem.

I'd like to live in a world where people embrace objective truths rather than be offended by them.

The methods and tools of science perennially breach barriers, granting me confidence that our epic march of insight into the operations of nature will continue without end.