Your center of mass is a place you cannot visit but you always carry with you. Like memories, it is part of life's baggage.

WhenIWasYourAge: It took a week to learn whether your photos came out okay.

If you're scientifically literate, the world looks very different to you, and that understanding empowers you.

Science literacy is the artery through which the solutions of tomorrow's problems flow.

I would say - and paint doesn't peel unless it's acrylic paint, so maybe it is acrylic paint that they're using, not oil paint. So let me say yes, it would be acrylic house paint, which, when it dries, peels very nicely. So let's go with that.

Intelligent life can't be all that common because it's really rare on Earth and especially since we define ourselves to be intelligent. But in the eyes of an alien coming here who has the technology to make it here, they might observe us and conclude that there's no sign of intelligent life on Earth.

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).