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Dark Days Ahead for Spirit
Topic: Mars
The mission of NASA's Mars rover Spirit was initially scheduled for three months. Now, the rover has marked six years on Mars. In this time, Spirit has found evidence that the ancient environment of Mars was far different than today. The data will help astrobiologists understand if the red planet was once habitable for life.

Astrobiology Top 10: Too Salty to Freeze
Topic: Mars
AM is highlighting the top 10 astrobiology stories of 2009. At number 4 is evidence of liquid water droplets forming on the leg of the Phoenix lander. Scientist had assumed ice turned directly into water vapor on Mars' surface, but the water droplets on Phoenix tell a different tale. (Originally was published on March 20, 2009).

How to Find Signs of Life on Mars
Topic: Mars
By studying the signatures of fossil life on Earth, geobiologists can get a clue of what to look for when hunting for extraterrestrial life on Mars.

Martian Moon Duo
Topic: Mars
ESA's Mars Express orbiter has captured the first image to show Mars' moons Phobos and Deimos together in a single frame. The image will help scientists refine orbit models of the two moons.

The Meandering Channels of Mars
Topic: Mars
Sinuous channels on the Martian surface may be evidence of relatively recent rainfall. Researchers plan to test this hypothesis by studying sinuous streams on Earth.

Mars Methane Not From Meteors
Topic: Mars
Scientists have ruled out the possibility that methane is delivered to Mars by meteorites, raising fresh hopes that the gas might be generated by life on the red planet.

Mars Meteorite Debate Continues
Topic: Mars
Scientists have reexamined the 1996 finding that a meteorite contains evidence that life may have existed on ancient Mars. The study argues that life remains the most plausible explanation for the materials and structures found in the meteorite.

Martian North Once Covered by Ocean
Topic: Mars
Scientists recently used a computer program to produce a more detailed global map of valley networks on Mars. The results are consistent with past climate scenarios that include precipitation and an ocean in the martian north.

Become a Martian
Topic: Mars
NASA and Microsoft have created the new 'Be a Martian' Web site, which allows citizen scientists to participate in projects such as improving martian maps and assisting Mars science teams. Now the public can help astrobiologists determine the past habitability of Mars.

Taking a Bite of Antarctic Ice
Topic: Mars
NASA┬┤s IceBite team will spend six weeks studying a place on Earth that resembles the Phoenix landing site on Mars. The place: a mile above sea level in Antarctica┬┤s McMurdo Dry Valleys. The ultimate goal: to test ice-penetrating drills for a future mission to the martian polar north.

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