De Rozier's experimental system consists of a hydrogen balloon and a hot air balloon tied together. Tragically, the craft explodes half an hour after takeoff. This double balloon helium/hot air ...

A reusable hot pack made of a supersaturated sodium acetate solution that crystallizes spontaneously once triggered by a metal piece releases heat. A balloon filled with hydrogen gas also releases ...

Early on he switched to hydrogen to fill his balloons, which gave more lift and, while quite flammable, didn’t require an open flame like the hot-air balloons. The feat he is best known for came ...

The popular hot-air balloon carrying the Olympic flame, which brought in thousands of visitors during the summer of 2024, ...

A reusable hot pack made of a supersaturated sodium acetate solution that crystallizes spontaneously once triggered by a metal piece releases heat. A balloon filled with hydrogen gas also releases ...