Gemini&Genius 3-Piece Dinosaur Set With T-Rex & Cubs, Action Figures, Moveable Jaw, Cake Topper, Party Gift For Kids 3-12 Years Old? The Tyrannosaurus Lived Approximately 70 Million Years Ago And Was One Of The Largest Carnivorous Dinosaurs. Its Name Means 'King Of The Tyrant Reptiles'. The Most Famous Was Certainly The T Rex, Whose Reputation Was Built On Its Ferocity. With A Gigantic Body Of Almost 12 M In Length, And A Huge Snout With 20 Cm Sharp Teeth, The Tyrannosaurus Was A Terrifying Animal. This Biped With Tiny Front Arms Could Exceed A Height Of 6 M And Weigh More Than 6