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Science and Space
Main Health and Human Body Earth Space Prehistoric World A-Z

Dinosaurs Fleeing Volcano Eruption

A thick rain of volcanic ash sends a rat-size mammal, Gobiconodon zofiae, and three Dilong paradoxus dinosaurs fleeing for their lives in this artist's depiction. Based on the features of a 125-million-year-old fossil preserved by such ashfalls, these tyrannosaurs exhibit a downy covering of protofeathers, the first found among their family. The evolutionary precursors of true feathers, protofeathers were hairlike and probably developed for insulation.

Artwork by Lars Grant-West