Tyrannosaurus's tiny arms are often joked about. But were their surprisingly muscular limbs actually more useful than they're given credit for? Museum scientist Kieran Miles explains some of the theories for what these famous dinosaurs may have used their disproportionately small appendages for. ---------------- The Natural History Museum in London is home to over 80 million specimens, including meteorites, dinosaur bones and a giant squid. Our channel brings the Museum to you - from what goes on behind the scenes to surprising science and stories from our scientists. Subscribe to our channel for the latest films and live broadcasts about the natural world null Website: http://www.nhm.ac.uk/ Twitter: http://twitter.com/NHM_London Facebook: http://fb.com/naturalhistorymuseum Instagram: http://instagram.com/natural_history_museum