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.

A person can live without food for about a month, but only about a week without water. If the amount of water in your body is reduced by just 1%, you’ll feel thirsty. If it’s reduced by 10%, you’ll die.