This is a bit old, but still super cool!
Researchers experimenting with flames onboard the International Space Station have produced a strange, cool-burning form of fire that could help improve the efficiency of auto engines.
Flaming spheres on the ISS turn out to be wonderful mini-labs for combustion research. Unlike flames on Earth, which expand greedily when they need more fuel, flame balls let the oxygen come to them. Oxygen and fuel combine in a narrow zone at the surface of the sphere, not hither and yon throughout the flame. It’s a much simpler system.