Turtle shells are truly remarkable structures. As embryos, turtles' bones begin to fuse, as ribs, shoulder bones, and vertebrae merge together to form the hard outer shell. That's an incredible evolutionary adaptation, and the Permian fossil Eunotosaurus helps explain how turtles got their shells.
For a brief period after the dinosaurs vanished, truly gigantic reptiles like the 50-foot snake Titanoboa and twenty-foot crocodiles dominated the swamps of ancient Colombia. Now we've discovered another, much gentler giant - the humongous 60-million-year-old "coal turtle."
Turtles are one of many species that use their sense of Earth's magnetic field to navigate great distances. But the magnetic field is constantly drifting, and that can cause major confusion in such a long-lived species. Here's their ingenious solution.
This is an artist's conception of the river turtle Boremys, which is one of the first known species whose existence actually improved in the immediate aftermath of the massive extinction event, 65 million years ago.
This massive turtle, weighing 440 pounds, was pulled out of Hanoi's Ho Hoan Kiem, or Lake of the Returned Sword, by a few dozen people, including Special Forces soldiers, using three nets.
It's comforting to know that during the height of Reagan's Cold War in the 1980s, the Soviet Union was making movies that were just as cheesy as the ones you could see in the United States. When you see this clip of the scary, growling radioactive giant turtle from Мутанты (which means Mutant), you'll be forced to…