onehitwonder writes "Reuters reported yesterday on new scientific research that indicates how dinosaurs beat out another early reptilian species for domination of the earth. Roughly 200 million years ago, dinosaurs battled with another dinosaur-like animal, the crurotarsan, which is related to the crocodile. Some species grew to 39 feet long, according to the article, at an epoch when few dinosaurs exceeded 10 feet in length. Scientists used to believe that dinosaurs beat out the crurotarsans because the dinosaurs were physiologically superior. But new research indicates that dinosaurs might have won out due to a large stroke of cosmic luck, the nature of which is speculative."