Today's space food has come a long way since the Mercury Program of the early 1960s. When John Glenn first tried apple sauce from a squeeze tube onboard his Friendship 7 spacecraft in 1962, who could have dreamed that later astronauts would be able to choose from such a wide variety of foods?See also: Food in Space: Great Photos of Astronaut Meals, from the Early Space Voyages to Today, on io9.
Glenn's consumption of applesauce, packed in a tube, and xylose sugar tablets with water, demonstrated that people could eat, swallow, and digest food in a weightless environment.Project Mercury astronauts had semi-liquids in tubes or dehydrated cubes that would re-hydrate with their saliva, which no one liked. Every single astronaut returned home with un-eaten food, having either evaded or downright lied to their Mission Control CapComs about eating. For the Gemini missions, special bags in which the dehydrated foods could be rehydrated were designed, and the food got better with the later missions.
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