A new species of armored dinosaur discovered in Chile had a weaponized tail not seen before in any other dinosaur. Roughly 2 meters (6.5 feet) in size, the small armored dinosaur called an ankylosaur dates from the late Cretaceous period, around 71.7 million to 74.9 million years ago. Its largely complete fossilized skeleton was found in Magallanes province in Patagonia, Chile's southernmost region. The dinosaur, named Stegouros elengassen, had evolved a large tail weapon unlike