Methane Survey Reveals Mars Is Far From 'Dead'

Via Discovery News:

A six-year study of methane in Mars' atmosphere shows the planet is far from dead, though whether it is merely geologically active or host to microbial life is unknown.

An Italy-based team of researchers combed through billions of measurements taken by NASA's Mars Global Surveyor to compile seasonal maps of the gas, a simple chemical compound that appears in minute quantities in Mars' carbon dioxide-rich atmosphere.

Methane breaks down in ultraviolet light from the sun, so scientists know it is being replenished in some way from the planet itself. The speed at which the methane is being depleted -- less than a year -- is as great a mystery as what's causing it.

Link: Discussie op Slashdot.