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Mars

Submission + - Studies show life may exist without oxygen (msn.com) 1

mayberry42 writes:

Scientists have found Earth's oldest fossils in Australia and say their microscopic discovery is convincing evidence that cells and bacteria were able to thrive in an oxygen-free world more than 3.4 billion years ago. The finding suggests early life was sulphur-based — living off and metabolizing sulphur rather than oxygen for energy — and supports the idea that similar life forms could exist on other planets where oxygen levels are low or non-existent.

While the (news) title may have been a bit sensationalistic, it's still exciting to know that life could exist in a very different environment that what we previously believed.

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Studies show life may exist without oxygen

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  • Isn't life theorized to be the reason Earth's atmosphere is oxygen rich? Has this theory been debunked? And aren't there already extremophiles that don't use oxygen?

    Here's a little on-topic fiction [slashdot.org] that might be food for thought.

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