An inexplicable white-and-blue flash was spotted lighting up the sky over the southern Russian city of Stavropol. A dashcam video has since triggered a heated debate over the origins of the mysterious sight. Stavropol’s horizon offered a jaw-dropping view to those who weren’t asleep at around 00:39 local time (21.39 GMT on Monday). The soundless flash of light scared several people, as it made... 

Particles from a recent solar storm are expected to induce temporary radio blackouts in some areas and create Northern Lights, or auroras. Following a massive eruption of solar plasma known as a coronal mass ejection (CME) on December 26, experts predict the fast-moving charged particles strike the Earth’s magnetic field on Wednesday, December 28, for about seven hours. Particles from another...