A team of scientists recently unearthed the fossilized remains of a tiny jaw bone and claw in the United States. 3D scans of the fragments revealed they belonged to tyrannosaurs – the cousins of T. rex. Based on the size of the fossils, it is believed a baby tyrannosaurs would measure about 3-feet long when they hatched – about the size of a Border Collie dog.

The findings suggest a tyrannosaurs eggs would measure around 17 inches long. No tyrannosaur dinosaur eggs have ever been found.

Tyrannosaurs lived more than 70-million years ago. There are many types of tyrannosaurs including the popular Tyrannosaurus rex. They had large skulls, foreword facing eyes, and humorously short arms.

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