Mars Might Have Life, Earths Might Be Rare

A bevy of space stuff. First, check out this picture from the Mars Rover that might be showing water that was squeezed out of the ground and then quickly refroze when the Mars Rover pressed it down with its wheels:

Second, a fascinating article from on the possible detection of life on Mars by the Mars Rovers:

Those twin robots hard at work on Mars have transmitted teasing views that reinforce the prospect that microbial life may exist on the red planet.

Finally, while I believe that Earth-like planets are probably very common, another interesting article reports that some scientists feel that they might be very rare.