Curiosity Drilling On Mars

NASA's Curiosity rover has begun drilling into rocks on Mars.  The first attempt at drilling seems to have been a complete success.

Curiosity will drill into rocks to learn about their internal compositions.  Scientists are especially looking for evidence in the rocks of the history of water on the surface of the planet.  A case is building for a warmer, wetter Mars at points in the past.  That, in turn, would argue for the possibility of life on Mars at some point.