This photomicrograph focuses on a large "biomorph" from a Mars meteoritefragment known as Nakhla e4150ed. Its chemical spectrum appears to be primarily
iron oxide but with a carbon content slightly greater than the underlying matrix. David McKay / NASA
From MSNBC/Cosmic Log:
Do rocks from Mars bear the tiny fossilized signs of life? Scientists who think so say they'll subject meteorites from the Red Planet to a new round of high-tech tests in hopes of adding to their evidence.
For years, only one meteorite has figured in the controversy: ALH84001, a rock that was blasted away from Mars 16 million years ago, floated through space and fell through Earth's atmosphere onto Antarctica about 13,000 years ago. Scientists reported in 1996 that the rock contained microscopic structures that looked like "nano-fossils," but skeptics said the structures could have been created by chemical rather than biological reactions.
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