Scientists Finally Think They Know Why T. rex Had Tiny Arms

A new study suggests T. rex and other giant predators evolved tiny arms because their massive skulls took over as the primary hunting weapon. As their bites became more powerful, their forelimbs may have gradually faded into evolutionary leftovers. Why T. Rex and Other Giant Predators Evolved Tiny Arms The famously tiny arms of Tyrannosaurus [...]

from SciTechDaily https://ift.tt/itzYbws