He flew his first hydrogen gas balloon in Paris in March 1784. Later that year, he arrived in England, preparing for a risky journey across the 20-mile Strait of Dover between England and France.

Pilatre de Rozier, the world's first balloonist, is killed in his attempt to cross the channel. De Rozier's experimental system consists of a hydrogen balloon and a hot air balloon tied together.

and was the first to use a parachute in 1793. (That was an unplanned success — his balloon ruptured and he had to bail out.) Early on he switched to hydrogen to fill his balloons, which gave ...

XIII fighter is 2nd Lieutenant Frank Luke. He’s about to take down his first German observation balloon. The Germans have ...

Hydrogen has up to three times more energy per kilo than traditional aviation fuel, says Piccard, who in 1999 also completed the first non-stop circumnavigation of the globe in a balloon.

A balloon filled with hydrogen gas also releases heat when lit on fire. Due to differences in energy density, the crystallization of sodium acetate releases more heat per mole than the hydrogen gas ...

A balloon filled with hydrogen gas also releases heat when lit on fire. Due to differences in energy density, the crystallization of sodium acetate releases more heat per mole than the hydrogen gas ...