Starlyte Posted September 4, 2003 #1 Share Posted September 4, 2003 Sept. 3, 2003 — Laboratory evidence is challenging theories that Mars' ruddy surface came from a past when the planet was awash with water, New Scientist said. Defenders of this hypothesis say Mars' reddish dust came from iron in rocks that over billions of years dissolved into the planet's oceans, lakes and rivers. The iron oxidized and was then deposited all over the Martian surface thanks to the planet's weather system. It was then left high and dry after the waters mysteriously disappeared, either receding below ground or boiling into space. But U.S. scientist Albert Yen of NASA's Jet Propulsion Laboratory has assailed this idea, noting a strange discrepancy between Mars' dusty topsoil and its rocks. The topsoil has more magnesium and iron than the rocks, according to data sent back by the 1997 Mars Pathfinder mission. Yen believes that the dust can only have come from tiny metal-rich debris that constantly falls onto Mars from space. According to his calculations, the dust-fall is big enough to coat Mars to a depth of two inches every billion years. Full Article LINK Link to comment Share on other sites More sharing options...
SpaceyKC Posted September 4, 2003 #2 Share Posted September 4, 2003 I guess you could say that Yen's theory could blow the others 'out of the water'. Great article starlyte. Christmas Day could bring a really nice suprise (as far as the topic of Mars is concerned). Link to comment Share on other sites More sharing options...
Homer Posted September 6, 2003 #3 Share Posted September 6, 2003 Thanks starlyte, that's a fascinating article. It will be interesting to see the information brought back from those three Mars missions Link to comment Share on other sites More sharing options...
Kaj Posted September 6, 2003 #4 Share Posted September 6, 2003 Thanks starlyte, that's a fascinating article. It will be interesting to see the information brought back from those three Mars missions Yes...this will be exciting...waiting for that too Btw, good work Starlyte Link to comment Share on other sites More sharing options...
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