Except for the fact that we continuously discover new energy sources and new ways to store information. There are indeed fundamental limits imposed by thermodyn

Except for the fact that we continuously discover new energy sources and new ways to store information. There are indeed fundamental limits imposed by thermodynamics, but something as crude as space travel is not limited by them. Rather the limit is the immaturity of our technology. And a space ship is not an isolated system: it can shed waste heat, and as long as it has a power source, the entropy of the living space can be controlled.