Penguins on Mars?

From Nature:

Mars Should we be looking for penguins on Mars, rather than little green men? Just a week after finding definitive signs of water ice just beneath the surface, news of another remarkable scientific discovery has been beamed back to Earth by the Mars lander Phoenix. This time it’s about muck. The soil under the lander was scooped up into its onboard chemistry lab just a few days ago, and subjected to a round of prodding, poking and other analysis. And the results? Martian soil is like Antarctic soil. “This soil appears to be a close analogue to surface soils found in the upper dry valleys in Antarctica,” says Sam Kounaves of Tufts University in Medford, Massachusetts, leader of the ‘wet chemistry’ portion of the Phoenix mission.

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