Scientists have just found a sixth mass extinction hidden in Earth’s ancient past

The peak of the Ediacaran period, about 550 million years ago, was a flowering time for life in Earth’s oceans. Petalonamids in the form of feathers absorb nutrients from the water, like a slug Kimberla They were grazing on microbial mats, and the ancestors of jellyfish were just beginning to make waves.

But then, 80% of life on Earth vanished, leaving no trace in the fossil record.

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