A robot orbiting Mars takes a picture of another robot roaming the surface.
See the dot in this picture, taken of the surface of Mars from orbit? That dot is about a billion dollars worth of extraterrestrial science in action.
Mars Curiosity rover analyzes its first sample of Martian soil and finds water, proving that water exists on the red planet.
It won’t be life, and it most likely won’t be fossil bacteria, but the rovers can still learn some surprising facts about Mars.