Because of the 18th century, men and women have been inflating balloons of cloth or canvas with sizzling air and sending it aloft, the Montgolfier brothers going as far as to experiment with very first animals in 1782, and after that, when altitude didn't eliminate them, human beings in 1783. https://juliusxfkqv.wikitidings.com/6606726/ballon_arch_fundamentals_explained