Two new dino species discovered
Two previously unknown species of dinosaur have been found at separate sites in Antarctica by US scientists. The first dinosaur is a new type of theropod - a two-legged forerunner of birds - and is thought to have lived about 70m years ago. The second - a 200m-year-old sauropod similar to a diplodocus - was found on a 3,900-metre-high mountaintop.