The stegosaurus, a giant dinosaur that grew to more than 18 feet long and was armed with enormous bony plates on its neck, back, and tail, has a brain that weighed only 2 onces and was no bigger than a walnut.

Cheetah cubs have long tall hair that runs from their neck all the way down to the base of their tail, which is called the mantle. The mantle makes a cheetah cub look like a honey badger and makes them blend into tall grass, which helps keep them safe from threats like lions and hyenas.