Science

The 3.5-billion-year-old rock structures are one of the oldest signs of life on Earth

The 3.5-billion-year-old rock structures are one of the oldest signs of life on Earth

The 3.5-billion-year-old rock structures are one of the oldest signs of life on Earth

Layered rocks in Western Australia are home to some of the earliest known life on Earth, according to a new study.

The fossils in question are stromatolites, layered rocks formed by the excretion of photosynthetic microbes. The oldest stromatolites that scientists agree were made by living organisms date back to 3.43 billion years ago, but older specimens also exist. In the Dresser Formation in Western Australia, 3.48 billion year old stromatolites have been found.



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