An American black bear (they are often brown) is seen in Yosemite National Park. Rangers hope tracking the bears' locations will help prevent the animals from being hit by cars. Yosemite National Park via AP hide caption

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Yosemite National Park via AP

Yosemite Rangers Use Technology To Save Bears From Cars

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A photo provided by The Trust for Public Land shows Ackerson Meadow in Yosemite National Park, Calif. Visitors to the park now have more room to explore nature with Wednesday's announcement that the park's western boundary has expanded to include Ackerson Meadow, 400 acres of tree-covered Sierra Nevada foothills, grassland and a creek that flows into the Tuolumne River. Robb Hirsch/AP hide caption

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Robb Hirsch/AP

Royal Robbins climbs El Capitan's North American Wall in Yosemite National Park in 1964. Robbins is a climbing purist whose ideas helped shape the sport. Glen Denny hide caption

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Glen Denny

A Half-Century Of Battles For The Biggest Rock Walls

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Tommy Caldwell says he prefers to climb at night when the rock is cooler, his hands sweat less and the friction is better. He and Kevin Jorgeson have been trying for seven years to scale the whole Dawn Wall in one shot. Corey Rich /Courtesy of Corey Rich Productions hide caption

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Corey Rich /Courtesy of Corey Rich Productions

Free-Climbing Yosemite's El Capitan Takes A Team — And Time

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A charred tree rests on the forest floor after being sawn down to a stump Friday. Firefighters are still working to contain the Rim Fire, which is now the third-largest wildfire in California's history. Mike McMillan/U.S. Forest Service hide caption

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Mike McMillan/U.S. Forest Service