The Story Behind That Subway Sludge
Ever wonder what that black gunk dripping from the ceiling of your subway station is? Subway platforms – particularly on the bombed-out N line [http://www.bensonhurstbean.com/2015/01/post-apocalyptic-n-line-get-repairs-screwing-commute/] – are often sprinkled with massive, black Rorschach blotches of goo, that can be traced directly to tiny stalactites emerging from