18. The T-Rex Was Certainly Well-Endowed
Ever wondered how the Tyrannosaurus rex reproduced? Well, it appears using its 3.6metre-long penis... Most dinosaurs are believed to have reproduced in a similar way to modern-day birds and reptiles - by pressing their "cloacas", or reproductive and defecation organs together - but some, including the T-rex (or "tyrant lizard"), are thought to have had penises.