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Astronauts spend long spans of time in space, and they have to eat.
Though menus for early space missions were limited, astronauts today can select their meals from a large variety of food items. When astronaut John Glenn made his recent spaceflight in 1998, he chose a menu that included shrimp cocktail, sliced beef with barbecue sauce, peanut butter and jelly wrapped in a flour tortilla, pudding and Snickers bars. This was a big improvement over his previous Mercury flight in 1962. That time he was the first person to ever eat in space, sampling applesauce from a squeeze tube. The squeeze tubes weren't very popular.