Glaciers are the master craftsmen of mountains. Down through the centuries their massive weight grinds down and rearranges the face of mountains. Glaciologist Jon Riedel takes a look at these rivers of ice, and their impact on the landscapes of North Cascades and Mount Rainier national parks, in this captivating video.

In the wake of an accident in which a 6-year-old boy was swallowed by a sink hole in the Mount Baldy sand dune at Indiana Dunes National Lakeshore, officials have closed access to the massive dune indefinitely.

Are bear problems at Apostle Islands National Lakeshore in Wisconsin tied to the budget sequestration? They could be, as the lakeshore wasn't able to hire as many seasonal rangers as it has in the past.

A look at news from around the National Park System finds drug busts in Utah, another hiker death at Glacier National Park, and a photo contest for the National Mall.