What is the largest known dinosaur?
Specimens of very large dinosaurs exist only in the form of a few bones or fragments of bones. They are so fragmentary because the sediment in which the bones occur seldom accumulated rapidly enough to bury the bones before they were largely destroyed by weathering. Thus, the appearance of a giant dinosaur must be inferred from incomplete skeletal parts. Arguably, the largest dinosaur known is represented by a fragment of a vertebra that originally measured between 2.4 and 2.7 m (7.9 and 8.9 ft) tall. The bone, from the middle of the animal’s back, came from a Diplodocus-like sauropod that is estimated to have measured between 40 and 60 m (130 and 200 ft) long. The animal probably weighed between 100 and 150 metric tons (220,000 and 330,000 lb). The name Amphicoelias has been given to this dinosaur. The sediments in which the bone fragment was buried were deposited approximately 150 million years ago, during the late Jurassic Period. Q: What is the most ancient known dinosaur? A: No si
