Just before seeing this on HN, I randomly came across this article on "dark lightning" -- a burst of gamma rays that accompanies the RF burst that precedes visi

Just before seeing this on HN, I randomly came across this article on "dark lightning" -- a burst of gamma rays that accompanies the RF burst that precedes visible lightning. http://www.sciencedaily.com/releases/2013/04/130424210319.htm http://www.sciencedaily.com/releases/2013/04/130424210319.ht...