An Australian-U.S. team of paleontologists has found a unique fossil of a huge, carnivorous platypus that lived in what is now Australia during the late Miocene. This is an artist’s reconstruction of Obdurodon tharalkooschild. The inset shows its first lower molar. Image credit: Peter Schouten. The modern platypus is a duck-billed, venomous, semi-aquatic mammal with webbed feet and is covered in short waterproof fur. It is one of the five extant...