Dinosaurs ruled the Earth for more than 140 million years and are considered the ancestors of today's reptiles. Tyrannosaurus Rex was one of the largest land-dwelling carnivores to ever live on Earth. Fossil skulls found at archaeological sites exhibit extremely large teeth and large, weight-reducing holes. The Exo Terra T-Rex skull looks very realistic and adds a prehistoric touch to any terrarium—desert, rainforest, or aquaterrarium. For easy access, this fossil skull hide features multiple entrances and adds an extra dimension to the terrarium. The humid microclimate inside the Exo Terra T-Rex skull promotes thermoregulation and hydration, contributing to the natural shedding process of reptiles.