Fossils of lion species extinct for 18 million years found
Australian scientists have discovered remains of a new species of meat-eating marsupial lion, which became extinct at least 18 million years ago. Researchers estimated the lion was as big as a medium-sized dog,  and weighed over 22 kg. The species is a member of the Thylacoleonidae family, known for their large, blade-like premolars for cutting flesh.