Tooth chemistry reveals dinosaur migration

[Still Waters]

A collection of teeth from dinosaurs in the western United States has produced the first solid evidence that these ancient animals undertook seasonal migrations.

It is often hard to determine what dinosaurs looked like from fossils — and trying to infer behaviour adds a whole different level of difficulty.Nevertheless, it has often been assumed that dinosaurs did migrate.

Henry Fricke, a geochemist at Colorado College in Colorado Springs, and his colleagues now seem to have hard evidence that sauropod dinosaurs moved hundreds of kilometres every year.

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