In the U-boat-infested waters of 1917, the obvious way to protect a ship was to make it blend in. Instead, navies painted their vessels in screaming, chaotic geometric patterns, turning warships into floating avant-garde art. Remarkably, the madness worked.

This episode traces dazzle camouflage from World War One naval archives to modern vision studies and even a 2026 battlefield, exploring why becoming the loudest target in the room can be the ultimate defense. It's a story of zoology, optics, ego, and an illusion that refuses to die.

• How the coincidence rangefinder relied on lining up a straight vertical edge, and why shattering that line blinded the U-boat's targeting math
• The bitter rivalry between zoologist John Graham Kerr, whose biological theory was rejected, and artist Norman Wilkinson, who got the credit and the ...