What caused the mysterious silent flashes which lit up Russian sky? Weather experts say the lights 'cannot be natural' - and locals are baffled

Daily Mail: A mysterious silent flash which lit up the Russian night sky has baffled people and sparked theories of extraterrestrial activity. Experts have said the blue and white burst of light, which illuminated Stavropol in southern Russia, is not natural. The strange glow was not accompanied by any sound, according to witnesses, and made the city's street lights briefly go out. Theories include that the glow could have been caused by a military exercise, faults in the electricity network, the Northern Lights, an asteroid and even a UFO. This is not the first time that strange lights have been recorded in Russia. In November last year, an unexplained 11 second flash took place in Yekaterinburg...read more>>>...