In any city with lots of skyscrapers, lots of skyline, the moon seems bigger than it is. It's called the moon illusion.

People like it when they understand something that they previously thought they couldn't understand. It's a sense of empowerment.

A television advertisement must illustrate the scientific method to substantiate any claim.... That is why stains are lifted, ring-around-the-collar is removed, paper towels become soaked, excess stomach acid is absorbed, and headaches go away-all during the commercial.

But one of the coolest things about meteorites is that most were formed four-and-a-half-billion years ago, during the birth of our solar system, when, for reasons not yet known, a cloud of gas and dust was transformed into a sun with circling planets.

To achieve this density of a neutron star at home, just cram a herd of 50 million elephants into the volume of a thimble.

Extreme skepticism and extreme gullibility are two equal ways of not having to think at all. And I don't think I'm the first to say that.

The remarkable feature of physical laws is that they apply everywhere, whether or not you choose to believe in them. After the laws of physics, everything else is opinion.