Prehistoric Giants - 4/5/16
The largest turtle on Earth is the leatherback sea turtle, with a shell that’s up to 8 feet wide and a weight of more than 2,000 pounds. Sound big? Well, it is—until someone mentions Archelon, an ancient genus of monster turtles that once lived in a shallow sea covering what’s now South Dakota. Extinct for 80 million years, Archelon turtles made the leatherback look like, well, a shrimp.