Argentinosaurus is the largest known dinosaur to have ever lived, based on fossilised evidence. Weighing in at over 100 tons and measuring as much as 45 metres (148 feet) in length, this herbivore was wider and longer than a basketball court and was as heavy as a fuel-less jumbo jet.
The vertebrae of Argentinosaurus were very broad, with small peg-and-socket articulations above the spinal cord kept the backbones of these animals sturdy and rigid. In addition, the ribs of the Argentinosaurus were hollow, possibly allowing for greater manoeuvrability. Although the skull, neck and tail of an Argentinonsaurus have never been found, measurements made from a shinbone can estimate the size of the various features of this colossal creature. Each hind limb of the Argentinosaurus would have been about 4.5 metres (15 feet) long.