Reuters is reporting that a team of Australian paleontologists has discovered over 20 previously unknown species in a fossil dig in Northwest Queensland. Among the exciting critters revealed are a meat-eating kangaroo with enormous fangs and powerful forelimbs, and a giant carnivorous birds which the team describes as "demon ducks of doom." Poor alliteration aside, the ferociousness of the creatures doesn't seem to be an exaggeration. The well-muscled teeth on the kangaroo, for example, could reportedly crunch through bone and slice through flesh with ease. Of course, these fossils are about 10-20 million years old, so their descendants have since had plenty of time to contemplate the various ethical questions associated with meat eating.