Would a Helium powered balloon vehicle work on Mars? Things that might need to be answered:
How much liquidHeliumliquid Helium would you need to pack in order to fill a balloon with enough helium gas to travel the planet.
How much energy does it take to re-compress Helium per/litre at low temperatures on the surface of mars and would a solar cell be enough?
Would a "Balloot" (balloon/parachute) be enough to complete spacecraft re-entry on arrival to mars without really needing to immediately "touch down"?
Any other things to think about by anyone else?