The fossilized tail of a young dinosaur that lived on a prairie in southern Alberta, Canada, is home to the remains of a 60-million-year-old tumor.

Photograph of the larger hadrosaur vertebra in lateral view (left) and caudal view (right).
The space that contained the overgrowth opens to the caudal surface of the vertebra
[Credit: Assaf Ehrenreich, Sackler Faculty of Medicine, Tel Aviv University]Researchers at Tel Aviv University,…

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Source: archeo