National Science Environment Scientists Explore Purple Microbial Mats In The Depths Of Lake Huron 4:29pm September 05, 2016 by Ben Thorp U.S. Science Environment Share URL copied to clipboard! Copyright 2016 NPR. To see more, visit NPR. 300x250 Ad More All Things Considered National The latest on the shooting outside a Jewish museum in Washington, D.C. Arts One man's effort to bring 'Sinners' to residents of the town where it takes place 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate