A composite view of Protocodium sinense, a new species of green algae from more than 541 million years ago. To the left is an external view of the fossil, followed by a view through the outer layer (green) and an image of the inner core (gold).

Plants Evolved Even Earlier Than We Thought, Exquisite 3D Fossils Suggest

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The oldest three-dimensionally preserved green algae may suggest that plants arose earlier than previously believed. The fossils are over 541 million years old, which places them at the end of the Ediacaran period (635 to 541 million years ago). It was at the dawn of the Cambrian Period (541 million to 485.4 million years ago) …

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