Glaciers in the European Alps pose a scientific mystery. Now, they started melting rapidly back in the 1860s, and in the span of about 50 years, some of the biggest glaciers retreated more than half a mile. Nobody could explain why. Now, a new study suggests the glaciers melted because they were covered with soot from the Industrial Revolution. NPR's Richard Harris reports.
Before summer slips away, North Country Public Radio's Brian Mann decided to take a day off from work for one last hot weather canoe trip in upstate New York. With his wife Susan, Brian paddled and trekked through the Ausable Marshes in the Champlain Valley. He sent back this audio postcard.
This is WEEKEND EDITION from NPR News. I'm Scott Simon. Coming up, AJ Jacobs with some tennis trivia you won't hear anywhere else - boy, I hope it's true. But first, why worry about mobile phones when you can let someone know what's on your mind with no costly monthly contract? Two researchers at the University of Washington made a move - if you please - in that direction. Rajesh Rao is a professor of computer science.