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Trilobites: Where Did Animals With Tail Weapons Go? Here’s a Back Story

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Trilobites: Where Did Animals With Tail Weapons Go? Here’s a Back Story

A Tyrannosaurus rex hunting a pair of ankylosaurs, which were equipped with bony, club-like tails. Researchers puzzle as to why more modern animals don’t have tail weaponry.

By NICHOLAS ST. FLEUR

Full Story at https://www.nytimes.com/2018/01/16/science/tails-weapons-dinosaurs.html?partner=rss&emc=rss

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