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Credit: Julius Csotonyi 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 40 feet in length and weigh eight tonnes. A team of palaeontologists, led by a University of Edinburgh researcher, made the discovery by examining the fossilised remains of a tiny jaw bone and claw unearthed in Canada and the US. Producing 3D sca...

AN EDINBURGH University-led team has rocked the world of palaeontology after they revealed that a baby tyrannosaur was likely only the size of a border collie. 3D scans of a tiny jaw bone and claw which had been found in Canada and the US have been identified as belonging to the fossilised remains of tyrannosaur embryos. They suggest the creatures which lived more than 70 million years ago were only around three-feet long when they hatched, despite being able to grow to 40ft long and weigh around eight tonnes. The team has also estimated that tyrannosaur eggs - remains of which hav...

Baby tyrannosaurs were about the same size as a dog, new research shows Tyrannosaurs were fearsome predators in the dinosaur kingdom, but new research shows their hatchlings were about as big as a medium-sized dog. Researchers studying the first-known fossils of tyrannosaur embryos suggest the dinosaurs were approximately three feet long when they hatched, according to a study from the University of Edinburgh, published Monday. A team of paleontologists studied the fossilized remains of a tyrannosaurus embryo, namely a jaw bone and claw that were found in Canada and the US, respectively. Afte...