S1E73 - The Evolution of Colour Vision & Tetrachromacy

Can you hide your skeleton from a dog? Would you want to know the day you’ll die? Has evolution ever come close to producing a real fire breather?

Michael and Hannah test a T-shirt with a secret only humans can see, leading them into the strange world of colour vision, from colourblindness and tetrachromacy, to the remarkable eyes of the mantis shrimp.

They also ask whether DNA could become the ultimate hard drive, visit a data storage mountain in Pittsburgh and discover just how little space all of hu...