At -100 degree s F, you can  burn up to  5, 000 calorie s a day, and  with winte r at less than 1% hu midity, your body will los e water jus t breathin g. This is  Antarctica,  where close-kn it commu nities of scientists,  engineers, and harden ed field ve ts have forged an e xistence unl ike anything on our  planet, fighti ng brutal co nditions to condu ct crucial sci ence.！