Therizinosaurus: The Strangest Dinosaur Ever Found

In 1948, a Soviet expedition digging in the Gobi Desert pulled a single claw out of the sand that stopped the entire team. It measured roughly half a meter of bone alone, and in life, sheathed in keratin, it may have approached a full meter. Nobody had ever seen anything like it, and with no skull and no skeleton to give them context, they concluded it belonged to an enormous swimming turtle that used its claws to gather seaweed. They were wrong, and the truth turned out to be far stranger. Therizinosaurus stood roughly five meters tall and weighed as much as a small elephant. It belonged to the theropods, the same family that produced Tyrannosaurus rex and Velociraptor, the most formidable predators ever to walk on land. And it ate plants. In this prehistoric documentary we assemble the animal piece by piece and show why almost every part of it contradicts the part before: bear-like legs built for stability rather than speed, a barrel-shaped body dominated by an enormous fermentation gut, a long browsing neck, a comically small head with a toothless beak, and arms two and a half meters long ending in the largest claws of any animal that has ever lived. Then we answer the real question. What were those claws for? We look at the evidence for browsing hooks that pulled branches down from the canopy, the defensive argument against tyrannosaurs like Tarbosaurus, and the case for display, and we explain why they were probably doing several jobs at once. Subscribe for more prehistoric documentaries reconstructing Earth's lost worlds. Chapters: 00:00 – The 1948 Discovery: A Soviet Expedition and the Giant "Turtle" Claw 01:11 – The Surprising Truth: A 5-Meter Tall Herbivorous Relative of the T-Rex 01:44 – Building a Nightmare: Analyzing the Bizarre Anatomy from Feet to Beak 03:50 – The Mystery of the Scythes: Predator Claws vs. Browser Tools 05:28 – Defense Strategy: Why a Slow Herbivore Needed Meter-Long Claws 06:44 – The World of the Late Cretaceous: Rivers and Wetland