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 Vermont Judge releases Columbia University student Mohsen Mahdawi World News U.S. supports ally Israel at the International Court of Justice by Carrie Kahn 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate