The Cosmos is all that is or ever was or ever will be.

When Kepler found his long-cherished belief did not agree with the most precise observation, he accepted the uncomfortable fact. He preferred the hard truth to his dearest illusions, that is the heart of science.

It would be wryly interesting if in human history the cultivation of marijuana led generally to the invention of agriculture, and thereby to civilization.

For years I've been stressing with regard to UFOs that extraordinary claims require extraordinary evidence.

Except for fools and madmen, everyone knows that nuclear war would he an unprecedented human catastrophe.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

But amid much elegance and precision, the details of life and the Universe also exhibit haphazard, jury-rigged arrangements and much poor planning. What shall we make of this: an edifice abandoned early in construction by the architect?