Kangaroos did not always hop around, as an extinct, huge species of the animal would not have been able to, leaving them to walk places. According to Reuters, authors of a study published in the journal PLOS One made the observation through a biomechanical examination of fossils. Called sthenurines, these extinct kangaroos had shorter faces, bigger bodies and lived between 13 million and 30,000 years ago. The largest species, known as Procoptodon goliah, were estimated to weight some 530 pounds, measure 10 feet in length and stood as tall as six-feet, two-inches. Among several anatomical differences with modern kangaroos was their head, which more resembled a rabbit's. Read more: http://www.universityherald.com/art...were-huge-and-could-not-hop.htm#ixzz3GFPTXA00