July 16, 2006
Tyrannosaurs Faced “Midlife Crisis”
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Researchers studying the remains of Albertosaurus, Tyrannosaurus, Gorgosaurus and Daspletosaurus, concluded that life could be tough for teenaged tyrannosaurs. After surviving a high infant mortality rate, tyrannosaurs were relatively safe between age 2 and sexual maturity. At that stage, their mortality rate shot up to about 23%, possibly as a result of fighting for mates and the stress of laying eggs.
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