Across the American West, a massive glowing streak was seen in the skies last weekend — and an experimental rocket fuel seems to have been its source. As Live Science reports, the spectacular light show was almost certainly the result of spent fuel from ZhuQue-2E, a rocket from the Chinese startup Landspace that used a methane-based fuel known "methalox" as its upper stage burned. Launched on May 17, the rocket took off from the Jiuquan Satellite Launch Center in northwest China. On the other side of the Pacific Ocean, a mega-bright streak was seen over at least seven American states — […]