Snapping turtles as we know them first walked the earth some 40 million years ago, but they have been virtually unchanged over the past 215 million years of their evolution, according to Tortoise Trust. Although not among the most endangered tortoises and turtles according to the Turtle Conservation Coalition, the snapping turtle is listed as threatened.
Platypus. Native to eastern Australia, the animal is the only surviving example of its family, Ornithorhynchidae. This group of animals is believed to have split from mammals some 166 million years ago.
Aardvark Best known for being first on any alphabetical listing of wildlife, an aardvark is a nocturnal, burrowing animal and the only living species in the order Tubulidentata. Genetically, the animal can be considered a living fossil because of the ancient arrangement of its chromosomes. Aardvarks are excellent diggers