40 years ago, The US Coast Guard used to have a pigeon powered sensor to detect sailors lost at sea. https://medium.com/war-is-boring/that-time-the-u-s-coast-g

40 years ago, The US Coast Guard used to have a pigeon powered sensor to detect sailors lost at sea. https://medium.com/war-is-boring/that-time-the-u-s-coast-guard-had-a-pigeon-powered-sensor-147db4f4482b https://medium.com/war-is-boring/that-time-the-u-s-coast-gua...