From 1986 to 2007, all cosmonauts were equipped with a triple-barreled pistol, in case they encountered bears upon landing.
Previous Facts of the Day
Deer in headlights don't freeze purely out of fear - their eyes are so light-sensitive they are easily temporarily blinded.
Scientists are training drones to recognize and seek out human screams.
According to new research, less than 1% of Internet communities start 74% of conflicts.
In the 1860s Félix Nadar photographed the Paris Catacombs, asking workmen to pose with piles of bones for a sense of scale. They struggled to keep still, so he used mannequins instead.