While participating in a mock Mars mission, where crew members "lived" on the surface of the red planet for four months, Kate Greene determined that due to their size and food intake, "women are, on average, cheaper to launch and fly than men." With women requiring half the caloric intake of men, less food would need to be launched with the crew. It may seem ridiculous, but every pound counts to launch a rocket into space.
The calorie requirements of an astronaut matter significantly when planning a mission. The more food a person needs to maintain her weight on a long space journey, the more food should launch with her. The more food launched, the heavier the payload. The heavier the payload, the more fuel required to blast it into orbit and beyond. The more fuel required, the heavier the rocket becomes, which it in turn requires more fuel to launch.
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