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

In more than one respect, the exploring of the Solar System and homesteading other worlds constitutes the beginning, much more than the end, of history.

All colours are arbitrary.

The usual rejoinder to someone who says 'They laughed at Columbus, they laughed at Galileo' is to say 'But they also laughed at Bozo the Clown'.

Your religion assumes that people are children and need a boogeyman so they'll behave. You want people to believe in God so they'll obey the law. That's the only means that occurs to you: a strict secular police force, and the threat of punishment by an all-seeing God for whatever the police overlook. You sell human beings short.

Cleverly designed experiments are the key.

I can find in my undergraduate classes, bright students who do not know that the stars rise and set at night, or even that the Sun is a star.