A waitress serves shark fin soup in a restaurant in Guangzhou, in southern China's Guangdong province on Aug. 10, 2014. Johannes Eisele/AFP/Getty Images hide caption

itoggle caption Johannes Eisele/AFP/Getty Images

Fernandina's Flicker (Colaptes fernandinae), a woodpecker found only in Cuba. Pete Oxford/Minden Pictures/Corbis hide caption

itoggle caption Pete Oxford/Minden Pictures/Corbis

Tim Meyers on his four-acre vegetable farm in southwestern Alaska. Behind him: an endless sea of tundra, and a glimpse of the town of Bethel. Eugenie Frerichs for NPR hide caption

itoggle caption Eugenie Frerichs for NPR

Smoke rises from chimneys of coal-based power plants in the Sonbhadra District of Uttar Pradesh, India. The Washington Post/Getty Images hide caption

itoggle caption The Washington Post/Getty Images

A truck drives on top of a levee that protects a soybean field in New Madrid County, Mo., when the Mississippi River floods. Kristofor Husted/KBIA hide caption

itoggle caption Kristofor Husted/KBIA

Quinault Indian Nation President Fawn Sharp stands on the docks as tribal crabbers unload their catch. The tribe has vowed to fight the oil train-to-ship terminals proposed for Grays Harbor. Ashley Ahearn/KUOW hide caption

itoggle caption Ashley Ahearn/KUOW

Crew members pull an oyster dredge in Tangier Sound of the Chesapeake Bay near Deal Island, Md., in 2013. A study found that the Chesapeake Bay shellfishery is a "hot zone" for ocean acidification. Patrick Semansky/AP hide caption

itoggle caption Patrick Semansky/AP

Freight Farms are shipping containers modified to grow stacks of hydroponic plants and vegetables — anywhere, 365 days a year. Courtesy of Freight Farms hide caption

itoggle caption Courtesy of Freight Farms

"Understanding consciousness is a real key, I think, both to understanding the universe and to understanding ourselves." - David Chalmers James Duncan Davidson/TED hide caption

itoggle caption James Duncan Davidson/TED

Robert Davies (standing) and the quartet during a performance of "The Crossroads Project." Musicians include (left to right) Robert Waters, Rebecca McFaul, Anne Francis Bayless and Bradley Ottesen. Andrew McCallister /Courtesy of The Crossroads Project hide caption

itoggle caption Andrew McCallister /Courtesy of The Crossroads Project

To put their probes into the Arctic Ice, researchers hitched a ride on a South Korean icebreaker. Courtesy of Craig M. Lee/University of Washington hide caption

itoggle caption Courtesy of Craig M. Lee/University of Washington