Few things are as rare as a piece of rock that falls from outer space and crashes onto Earth.
Among the most prized of these meteorites are from Mars. Friday, scientists describe the latest one discovered: It's called Tissint, and this weekend you can buy a piece of it.
The Shuttle Endeavour began an incredible 12-mile journey through the streets of Southern California. The trip ends at its new home at the California Science Center.
Perhaps the AP put it best: In space, the shuttle traveled at a blazing 17,500 mph. But this final victory lap through narrow Los Angeles streets will proceed at 2 mph.