The potato has been studied by NASA as an important source of food for long manned space missions. It was found that the number of potato plants needed to sustain one astronaut equaled the amount of potato plant required to process the air to breathe by one astronaut.

During the 7th century B.C., ancient Roman “vestal virgins” were required to keep their hymens intact as proof of virginity until age 30 or they would be buried alive.

Commercial pilots who fly on international flights and the flight controllers who the pilots talk to are required to be able to speak English, the international language of flight.