Food

Even in deep space man needs to fulfil his basic needs. Therefore the food provided to the astronauts becomes an especially relevant issue when considering the ancient dream of manned missions to other planets.

Many complications arise when restrictions and requirements of human spaceflight constrain what an astronaut eats, such as limited space, weight, time to prepare a meal, and keeping healthy (nutrition), keeping for a long time (preservation), to mention but a few challenges faced.

Terrestrially, there are many analogous situations where many of these requirements should also be met, such as survival situations, exploration, mountain climbing, the battlefield, research and holiday traveling with backpack, sailboats, etc.