The crystal is made using a new material called BRG. They crafted a single stone that has brilliant coloration during the day and can glow for up to 24 hours.

Unlike auroras, which are caused by charged particles from the sun interacting with Earth’s magnetic field, noctilucent clouds are made of ice crystals and only appear at very high altitudes.

When you picture a sci-fi energy source, glowing green crystals are right up there. Scientists in China have now demonstrated just that, in the form of a “micronuclear battery” that can ...