As areas of knowledge grow, so too do the perimeters of ignorance.

The very nature of science is discoveries, and the best of those discoveries are the ones you don't expect.

If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of solar energy, the air temperature would rise, and the oceans would swiftly evaporate into the atmosphere as they sustained a rolling boil. This would be bad.

I never got into 'Star Wars.' Maybe because they made no attempt to portray real physics. At all.

Curiously, light-loving green plants reject the Sun's green light, reflecting it back at you, which is why they look green.

FM signals and those of broadcast television...travel out to space at the speed of light. Any eavesdropping alien civilization will know all about our TV programs (probably a bad thing), will hear all our FM music (probably a good thing), and know nothing of the politics of AM talk-show hosts (probably a safe thing).

To believe in a universe as young as 6 or 7,000 years old is to extinguish the light from most of the galaxy.