The Exo Terra T-Rex Skull is extremely realistic and adds a prehistoric accent to any type of terrarium; desert, rainforest or aquatic. This fossil skull hide-out offers multiple entrances for easy access and adds an extra dimension to the terrarium setup. The moist microclimate inside the Exo Terra T-Rex Skull will support thermo-regulation and hydration, and aid the natural shedding process of reptiles. Dinosaurs ruled the earth for more then 140 million years and are considered to be the ancestors of todays reptiles. Tyrannosaurus rex was one of the largest terrestrial carnivores to have ever roamed the Earth. Fossil skulls found on archeological sites show extremely big teeth and large, weight reducing holes.