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Life on Earth - and Mars?

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The discovery of a piece of geyserite found in a hot springs environment has changed our thinking about the origins of life on earth - and has implications for the search for life on Mars. Fossils discovered by UNSW scientists in 3.48 billion year old hot spring deposits in the Pilbara region of Western Australia have pushed back by 580 million years the earliest known existence of microbial life on land. Previously, the world’s oldest evidence for microbial life on land came from 2.7- 2.9 billion-year-old deposits in South Africa containing organic matter-rich ancient soils. The findings don't just extend...
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