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 Science Days are getting slightly longer — and it's due to climate change by Lauren Sommer What happened to the glamorous days of airline travel? You pay for what you get by Erika Beras 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate