A group of paleontologists have studied the fossilized remains of a tiny jawbone and claw of Tyrannosaurus found in Canada and the United States and were able to understand what the cubs of these giants looked like.
Three-dimensional scanning allowed us to determine whether the fragments belonged to these ancient lizards. According to experts, Tyrannosaurs were only about 1 m long at birth, although adults could grow up to 12 m.
Despite their small size, the cubs had external features typical of older animals, including a jawbone with a well-defined chin.
Weight and other parameters of the young were not reported. To date, little is known about the early developmental stages of Tyrannosaurs, which lived more than 70 million years ago. Most of the fossils studied belonged to adult or older animals.