The Picture Show Photo Stories From NPR

1909. Facing nearly due west from ridge northeast of Como Lake. Light selection cut in open ponderosa pine. Ground cover is comprised of perennial grasses and forbs, including basalmroot. A few low-growing bitterbrush plants can be seen in the vicinity of horses and in distance on left. A group of willows can be seen behind horsemen at left center. Photo 87357/U.S. Forest Service hide caption

itoggle caption Photo 87357/U.S. Forest Service

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A scientist stands in front of an ice-rich permafrost exposure in the coastal zone of Herschel Island, Yukon Territory, Canada. Ice in the permafrost is melting, contributing to rapid erosion. Michael Fritz/Alfred Wegener Institute hide caption

itoggle caption Michael Fritz/Alfred Wegener Institute

Steve Jobs and Steve Wozniak formed Apple Computer Co. on April Fool's Day, 1976. The Apple I, introduced soon after, was the first computer to come with a fully assembled motherboard (central printed circuit board). It sold for $666.66. Science & Society Picture Library / Contributor/Life hide caption

itoggle caption Science & Society Picture Library / Contributor/Life

The facilities at the Fukushima Dai-ichi nuclear power plant were designed to withstand strong earthquakes and tsunamis, but not to the strength and size experienced on March 11. Air Photo Service/AP hide caption

itoggle caption Air Photo Service/AP

A Tokyo Electric Power Co. worker looks at gauges in the control room for Units 1 and 2 at the Fukushima Dai-ichi plant, Wednesday. AP Photo/Nuclear and Industrial Safety Agency hide caption

itoggle caption AP Photo/Nuclear and Industrial Safety Agency

A fallout shelter sign graces the Madison County Courthouse in Huntsville, Ala., in 2007. The county is working on a plan to identify shelters that can house up to 300,000 people in the event of a nuclear incident. Dave Martin/AP hide caption

itoggle caption Dave Martin/AP