I don't know anything about physics but I heard that energy can't be created, only transfered. So if the center of the Earth is well isolated from cooling but we keep on drilling holes to take that heat out, how many of us would have to do it to speed up the cooling of the Earth? Also, would that be dangerous or not?,(reply>), it will take longer for the earth to cool down than for the sun to explode,(reply>), @Magellanic Well just because nobody can travel as fast as light doesn't mean we can't have an idea of the speed of light so we should be able to calculate this highly improbable possibility :),(reply>), the earth is absolutely massive. humans could never cool down the core