Post History
Say in the later 1700s/early 1800s handwavium is discovered. It's a metal that when heated causes more way more upward lift than hot air or hydrogen/helium produces in similar volumes. Air travel (...
Say in the later 1700s/early 1800s handwavium is discovered. It's a metal that when heated causes more way more upward lift than hot air or hydrogen/helium produces in similar volumes. Air travel (...