Mars

  • Martian Rock Not from Mars
    Over twenty meteorites from Mars have been discovered in Antarctica, so why shouldn't it be possible to find other chunks of our solar system sitting somewhere on Mars too? But the martian surprise of finding an off-world sample while driving has scientists inching towards a
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  • It Came Out of the Sky
    In this excerpt from the new Forward to the paperback edition of "Lonely Planets", planetary scientist David Grinspoon discusses the exciting discoveries unveiled by the twin rovers on Mars.
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  • Sifting Good Martian Trash
    There are few sites as startling as a view of space debris on another world. As Opportunity closes in on its first year anniversary on Mars, the flat Meridiani plains contrast with a scorched heat shield and what may prove to be a non-martian meteorite.
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  • Opportunity Knocks
    Counting down the top ten astrobiology stories for 2004 highlights the accomplishments of those exploring Mars, Saturn, comets, and planets beyond Pluto. Number one in this countdown was the Opportunity rover exploring Mars.
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  • Spirit on the Lake
    Counting down the top ten astrobiology stories for 2004 highlights the accomplishments of those exploring Mars, Saturn, comets, and planets beyond Pluto. Number four in this countdown was the Spirit mission to Mars.
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  • Mysterious Martian Methane
    Counting down the top ten astrobiology stories for 2004 highlights the accomplishments of those exploring Mars, Saturn, comets, and planets beyond Pluto. Number seven in this countdown was the startling detection of methane on Mars. Since methane concentrations would fall dramatically after only 300 years,
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  • Mars Remote
    Counting down the top ten astrobiology stories for 2004 highlights the accomplishments of those exploring Mars, Saturn, comets, and planets beyond Pluto. Number eight in this countdown was the Mars Express mission, the most complete study of martian topography and water from below the surface
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  • Modern Martian Marvels: Volcanoes?
    The European Mars Express orbiter continues to take overhead and perspective shots of landmarks on the red planet. The remarkable clarity at first glance appears to be a simulation. Scientists have pursued their mapping tour around Olympus Mons, the solar system's largest volcano, as one
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  • Jack Frost Hits Mars
    As the evidence for past martian water becomes stronger, what can be said about the hydrology today on the red planet? Looking for images showing weather on Mars requires some patience, but one may have to look no further than the rovers themselves to see
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  • Spirit Finds Water-Signature
    In the Columbia Hills, the Spirit rover has found what may be the strongest evidence yet that water played a role in martian geology. The mineral, goethite, which form only in water, suggests past water activity in the area that Spirit is now exploring.
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  • Mars Life: Trouble Without the Rubble?
    The Mars Opportunity site has continued to intrigue mission scientists and astrobiologists who study the prospects for life elsewhere in the universe. Finding evidence of water is a ways from finding evidence of life, but the absence of rocky rubble has contributed uniquely to what
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  • Proof of Water
    The evidence supporting a watery past on Mars is summarized by the rover team in their recent synopsis of early Opportunity results in Science magazine. According to Mark Lemmon of Texas A&M University, proof of water begins in the clouds but mostly remains locked in
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  • The Martian Methane Surprise
    Is the methane on Mars coming from deep underground? Astrobiologist Mike Mumma discusses some possibilities while explaining how to measure methane on another world.
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  • Blueberries, Add Water and Stir
    The remarkable story at Meridiani Planum is just beginning to be told, but the compilation of the water history at the Opportunity site has scientists prepared to view the red planet's aqueous past.
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  • Martian Day Dreaming
    Few images are more startling than seeing active weather from the surface of another planet. The evidence of clouds, sunset, and twisters raises the prospect of what a future Earth-like world might present to its first observer. The Mars case is an instance of seeing
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