Scenes from the Apostle Islands National Lakeshore in Bayfield, Wis., where Lake Superior's ice is thick enough to walk to the area's sea caves for the first time in five years.
Derek Montgomery for MPR News
February 5, 2014 Thousands of people have walked out to the caves in recent weeks to inspect beautiful ice formations. It's the first time Lake Superior's ice has been thick enough to walk on in the area since 2009.
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The Cathedral Spires in the Black Hills of South Dakota are just one of innumerable formations across the planet that speak to the Earth's ancient history.
K. Scott Jackson/Ohio Water Science Center/USGS
November 26, 2013 Feeling a little blue recently, commentator Adam Frank retreated to a hilltop and found something he wasn't looking for: perspective. The breadth of time stretched out before him and opened his eyes to our place in an ongoing story.
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