The White House and NASA want the public's help in hunting for asteroids that could potentially smash into Earth. They're also looking for a perfect space rock to capture so that astronauts could go there and study it.

Carl Sagan once wrote a mischievous paper called "A Search for Life on Earth from the Galileo Spacecraft". Being a living Earthling, he knew he'd find life here. So what was he reallyup to? The experiment he ran in 1990 is about to be repeated in a few weeks. Here's my closer look.

With several wildfires burning in Colorado, the smoke has to go somewhere, of course. But where? This photo from NASA may hold the answer.Currently 13鈥�