> you can't directly use heat for anything else other than for heating, where as electricity can be used to perform motion. Maybe today. But NASA has some inte

> you can't directly use heat for anything else other than for heating, where as electricity can be used to perform motion. Maybe today. But NASA has some interesting metal tires [0][1] which might change your mind for the future. [0]: NASA info https://technology.nasa.gov/patent/LEW-TOPS-99 https://technology.nasa.gov/patent/LEW-TOPS-99 [1]: Neat youtube vid: https://www.youtube.com/watch?v=vSNtifE0Z2Q https://www.youtube.com/watch?v=vSNtifE0Z2Q