How to Build an Ancient Robot

Using plans from a medieval text called "The Book of Ingenious Devices," experts recreate one of the world's first robots. (2:04)

Latest Videos

Preview thumbnail for video'Feuding Iguanas and Giant Rodents Rule This Cuban Island
Feuding Iguanas and Giant Rodents Rule This Cuban Island (1:45)
Preview thumbnail for video'Lionfish Are a Plague. Can Training Sharks to Eat Them Work?
Lionfish Are a Plague. Can Training Sharks to Eat Them Work? (2:52)
Preview thumbnail for video'Fascinating: How Transparent Glass Frogs Mate
Fascinating: How Transparent Glass Frogs Mate (1:43)
Preview thumbnail for video'Why 10 Daily Tons of Ant Poop Keep This Rainforest Thriving
Why 10 Daily Tons of Ant Poop Keep This Rainforest Thriving (3:35)
Preview thumbnail for video'Elephants Can Afford to Be Picky About This Kind of Fruit
Elephants Can Afford to Be Picky About This Kind of Fruit (2:11)
Preview thumbnail for video'What Lions Look for in the Perfect Prey
What Lions Look for in the Perfect Prey (2:25)
Preview thumbnail for video'Marianne North's Obsession with the Carnivorous Pitcher Plant
Marianne North's Obsession with the Carnivorous Pitcher Plant (3:41)
Preview thumbnail for video'How the Desert Oryx Stops Its Brain From Frying
How the Desert Oryx Stops Its Brain From Frying (1:35)
Preview thumbnail for video'Incredible: A Cheetah Sprints to Catch a Springbok
Incredible: A Cheetah Sprints to Catch a Springbok (3:18)