I have a question regarding the future of civilization in the universe. As we all know, the universe is expanding and, as per the 2nd law of thermodynamics, entropy is increasing. However, could a future civilization find a way to harness used energy (ie heat dissipated from resistors)? Also, I read somewhere that the maximum possible entropy in the universe rises as the universe expands, and that this creates a growing 'entropy gap' between the current entropy at any time in the universe and the maximum possible entropy at the same time. Could a civilization make use of this to survive? Thanks.