2. Imperial Scorpion: 400 Million Years Old
Also known as the emperor scorpion, it is the largest scorpion and oldest land animal on earth. Its fossils, which haven't changed in structure or shape since the beginning, have been dated as far back as 400 million years. Don't worry, though, most of the larger ones are no more dangerous than a wasp when it comes to the power of their stings. They're naturally found in West Africa, but have been seen all across the world.