Generally, an adult human consumes around 1,600 to 3,000 calories daily. But in colder climates, people need to eat more: Keeping our warm-blooded bodies warm requires a lot of energy. It’s so cold in Antarctica that the average person needs to consume 3,200 to 5,000 calories a day (watch out, Michael Phelps). And because the continent is frozen, no food grows there naturally. So how do the hundreds of scientists and support personnel who visit Antarctica’s McMurdo Station each year stay fed?