Thylacine - also known as the Tasmanian tiger, was a large carnivorous marsupial native to Tasmania, Australia, and New Guinea. Despite their intimidating appearance, they were a shy, nocturnal predator that hunted small prey, posing no real threat to humans or livestock. 1/5
Didymoceras nebrascense - an unusual ammonite from the Late Cretaceous, ~70 million years ago, found in the seas of North America. It was one of heteromorph ammonites, known for their odd shells that formed a variety of strange and complex shapes. 1/3