The Apollo pictures of the whole Earth conveyed to multitudes something well known to astronomers: On the scale of the worlds - to say nothing of stars or galaxies - humans are inconsequential, a thin film of life on an obscure and solitary lump of rock and metal

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

We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution of atoms; tracing the long journey by which, here at least, consciousness arose.

First rule in government spending: why build one when you can have two at twice the price?

The cosmos is full beyond measure of elegant truths; of exquisite interrelationships; of the awesome machinery of nature.

If we are not able to ask skeptical questions, to interrogate those who tell us that something is true, to be skeptical of those in authority, then, we are up for grabs for the next charlatan (political or religious) who comes rambling along.

Curiosity and the urge to solve problems are the emotional hallmarks of our species.