“The Mars rover Curiosity, for example, is powered by the heat from a chunk of plutonium it carries in a container on the end of a stick.” — Randall Munroe Copy Share Image
The Mars rover Curiosity has sent back images of some odd things on the surface of Mars, and some people think they could be UFOs. Here's my question. If we're on the surface of Mars, aren't we the UFO? — Jay Leno Copy Share Image
