Scientists solved a 500 million-year-old mystery about strange Cambrian structures found in China

Live Science

November 16, 2022

Over 500 million years ago, sea-dwelling invertebrates pioneered a new evolutionary experiment: skeletons. But while those durable, tubelike structures stood the test of time as fossils, the animals’ soft bodies decayed and vanished, erasing all evidence of what these ancient animals may have looked like. Now, a recent reexamination of those ancient skeletal tubes has finally unveiled the identity of one of these mysterious organisms.

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