During the Blitz in World War II, Great Britain implemented widespread blackouts, requiring all citizens to turn their lights off at night to prevent German bombers from easily identifying targets. Even streetlights were fitted with special covers so the beams were directed toward the ground after dark. Unfortunately, that meant that cows that happened to wander onto the roads at night posed a significant danger to drivers who couldn’t see them. As a result, British farmers painted white stripes on their cows to increase their visibility at night. It was a win-win for the farmers, the cows, and the British war effort.
