Obviously, the last thing you’d want is to have a fire in your spacecraft. However, NASA decided to light a fire in space on purpose. It was an elaborate experiment to understand how flames work in space. The results? Well, for one, the flames are blobby and spherical. The flames also follow the ventilation system instead of just rising up as they do here on planet Earth. Scientists are planning to conduct further experiments to learn more about how fires spread, how quickly, and which materials pose large threats to astronauts.