Dinosaurs

The tallest and heaviest dinosaur known from a complete skeleton-at 38 feet and weighing between 30-60 tonnes- is the Brachiosaurus. The longest complete dinosaur, however, is the 89 feet long Diplodocus. There were larger dinosaurs, but knowledge of them is based on incomplete fossil samples. For example, the estimated 60 feet Sauroposeidon, could easily have reached a sixth-floor window.