Dinosaur embryo find helps crack baby tyrannosaur mystery — ScienceDaily

They are among the largest predators ever to walk the Earth, but experts have discovered that some baby tyrannosaurs were only the size of a Border Collie dog when they took their first steps. The first-known fossils of tyrannosaur embryos have shed light on the early development of the colossal animals, which could grow to […]

1st of their kind baby tyrannosaur fossils unearthed

A fossil of what may be a tyrannosaur embryo shows that the gigantic apex predator started out with a skull the size of a mouse. That conclusion came after the study authors found a toe claw from a baby tyrannosaur in Alberta, Canada in 2017 — which prompted them to analyze  a previously known baby […]