For decades, scientists could not agree on whether to classify the Dickinsonia as an animal or not — until this new study ...

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A mysterious fossilized creature discovered more than a century ago has finally been decoded, offering stunning insights into one of the oldest animal groups on Earth. The enigmatic Helmetia expansa, ...

All animal evolution for the last half billion years has come from tinkering with these Cambrian body plans. Then, between about 570 and 530 million years ago, another burst of diversification ...