In 1969, millions of people around the Earth gathered around their television sets to witness an event that was happening 384,000 km away. The Eagle lunar landing was on its way to land on the moon, and it relied on the non-stop calculations of its on-board computer, which accomplished this with less computing power than a modern digital watch. However, three minutes before landing, the computer triggered several alarms: a radar that should have been switched off during the landing procedure un