Love your hair. Artists' depictions of a Neanderthal man and woman at the Neanderthal Museum in Mettmann, Germany. Martin Meissner/AP hide caption

itoggle caption Martin Meissner/AP

Each year, 6 to 8 percent of the global population of sharks and rays gets caught, scientists say. The fish can't reproduce fast enough to keep pace Mike Johnston/Flickr hide caption

itoggle caption Mike Johnston/Flickr

A sperm whale entangled in a drift net. A report says commercial fisheries around the world kill or injure 650,000 mammals a year. Alberto Romero/Marine Photobank hide caption

itoggle caption Alberto Romero/Marine Photobank

Workers in Oakland, Calif., check the damage to Interstate 880 on Oct. 19, 1989; this portion of the freeway had collapsed during the Loma Prieta earthquake two days earlier. Paul Sakuma/AP hide caption

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Strong gusts in Palm Springs, Calif., generate plenty of energy, thanks to turbine farms. But being able to store all of that energy is just as important. Kevork Djansezian/Getty Images hide caption

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Southern California's San Onofre Nuclear Generating Station, shown here in April 2012, was closed after small radiation leaks. Lenny Ignelzi/AP hide caption

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PG&E, a Northern California utility company, is already experimenting with big batteries to store wind-generated electricity at its Vaca-Dixon Substation. Richard Harris/NPR hide caption

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Puddled meltwater very likely primed this ancient edge of the Antarctic's Larsen Ice Shelf to rapidly disintegrate over just several weeks. This view of the splintered mix of frozen bergs is from a Feb. 21, 2002, satellite image. Landsat 7 Science Team/NASA/GSFC hide caption

itoggle caption Landsat 7 Science Team/NASA/GSFC

Wind turbines twirl above farmland on the outskirts of Madison, Wis. Not all locals are pleased. Scott Olson/Getty Images hide caption

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Andres Quiroz, an installer for Stellar Solar, carries a solar panel during installation at a home in Encinitas, Calif. Sam Hodgson/Bloomberg via Getty Images hide caption

itoggle caption Sam Hodgson/Bloomberg via Getty Images

The chimneys of the Kolaghat Thermal Power Station loom above a field flooded for rice farming near Mecheda, West Bengal, India, in July 2011. Dibyangshu Sarkar/AFP/Getty Images hide caption

itoggle caption Dibyangshu Sarkar/AFP/Getty Images