 | Researchers found organic matter in stromatolites -- fossilised microbial structures -- from the ancient Dresser Formation in the Pilbara region of Western Australia. The stromatolites have been thought to be of biogenic origin ever since they were discovered in the 1980s. |  |
 | Western Australia's 3.5-billion-year-old stromatolites push back the earliest known existence of microbial life on land by 580 million years. |
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