August 6th saw the maiden public flight of the world's first hybrid hot air ... balloon is heated by the sun instead of a propane burner, causing it to rise -- much like solar heated balloons for ...

two eminent Frenchmen went aloft themselves in the world’s first untethered hot-air balloon ride. Jean-François Pilâtre de Rozier, a chemistry and physics teacher, and the Marquis d’Arlandes ...