Two newly discovered fossils are helping scientists wrap their heads around the anatomy of the largest arthropod of all time — a millipede that grew longer than a king-sized bed and lived between 346 million and 290 million years ago.
Arthropleura was discovered in 1854, but no one had ever managed to find a fossil that included a head. “It was more than 100 years since we start trying to find a head. And now we finally have one,” says Mickaël Lhéritier, a paleontologist at Claude Bernard University Lyon 1 in France.
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