Preserve and cherish the pale blue dot, the only home we've ever known.

It is far better to grasp the universe as it really is than to persist in delusion, however satisfying and reassuring.

How lucky we are to live in this time / the first moment in human history / when we are in fact visiting other worlds

Somewhere, something incredible is waiting to be known.

A central lesson of science is that to understand complex issues (or even simple ones), we must try to free our minds of dogma and to guarantee the freedom to publish, to contradict, and to experiment. Arguments from authority are unacceptable.

If you want to save your child from polio, you can pray or you can inoculate....Try science.

Any civilization that doesn't develop space travel dies.