A deer-sized T. rex ancestor shows how fast tyrannosaurs became giants

The newly discovered fossil’s name, Moros intrepidus, means ‘the harbinger of doom’

Moros intrepidus

TINY TYRANNOSAUR  Standing only 1.2 meters at the hip, the newly discovered Moros intrepidus (illustrated) is one of the smallest known tyrannosaurs.

Jorge Gonzalez, © L. Zanno

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