Explanation: In WW2, Britain spread word that carrots improved night-time vision, and that its pilots were eating lots of carrots, in order to ‘explain’ why they were intercepting Nazi planes over Britain so reliably at night.

In reality, they’d figured out how to fit radar on their fighter planes, and wanted to keep that a secret for as long as they could. The hope was that Nazis keeping tabs on civilian British news would fall for the ruse, and buy UK plane radar a little more time undetected.

Carrots may prevent nutritional deficiencies that lead to poor night-time vision, but they aren’t going to make your MK1 eyeballs into NODs.