Changing Mars

At a press conference today, NASA announced seeing new things on the surface of Mars. By comparing Now and Then photos of the same places, they've seen evidence for water outflows and meteor impacts taking place in the past five years. Two gullies show evidence for new outflows, and several new craters have been spotted. Water comes up and rocks come down, and we can see the effects.

Mere Rhetoric live blogs the press conference, including the Q & A session. Another interesting example of science journalists in action. Watch out for the press articles, and see how well they correspond to what was really discovered.