Eotyrannus is a smaller version Tyrannosaurus. It lived in Europe during the early Cretaceous period. Like all Tyrannosaurs they were top carnivore of the time. They had small arms compared to the rest of its body. Which you can see in the future tyrannosaurus. Eotyrannus never appeared in any documentary but it is a good note to know while seeing the evolution of the mighty T-rex.