Atoms are mainly empty space. Matter is composed chiefly of nothing.

I don't want to believe. I want to know.

The cure for a fallacious argument is a better argument, not the suppression of ideas.

It is clear that the nations of the world now can only rise and fall together. It is not a question of one nation winning at the expense of another. We must all help one another or all perish together.

Even through your hardest days, remember we are all made of stardust.

All over the world there are enormous numbers of smart, even gifted, people who harbor a passion for science. But that passion is unrequited. Surveys suggest that some 95% of Americans are "scientifically illiterate." That's...the same fraction...of slaves who were illiterate before the Civil War.

Maxwell's Equations have had a greater impact on human history than any ten presidents.