In Jiaonan county, the Qi wall incorporates outcrops of bedrock. Linda Nicholas/The Field Museum hide caption

itoggle caption Linda Nicholas/The Field Museum

The Brazilian agricultural sector exported for a value of $94,590 million in 2011. One of its largest exports is soybeans, like these in Cascavel, Parana. Werner Rudhart/DPA /Landov hide caption

itoggle caption Werner Rudhart/DPA /Landov

Research excavations like these in Siberia's Denisova Cave are yielding clues to the mating choices of early hominids. Bence Viola/Nature hide caption

itoggle caption Bence Viola/Nature

Sediment samples from the seafloor near Long Island. UT Austin Institute for Geophysics hide caption

itoggle caption UT Austin Institute for Geophysics

The EPA tries to keep track of all sorts of methane producers — including herds of methane-belching cattle. Emmett Tullos/Flickr hide caption

itoggle caption Emmett Tullos/Flickr

The wreckage in Tacloban, Philippines, on Nov. 16 was overwhelming, after Typhoon Haiyan plowed through. David P. Gilkey/NPR hide caption

itoggle caption David P. Gilkey/NPR

The beef rib mummy that the researchers tested came from the tomb of Yuya and Tjuiu (sometimes spelled Tuyu). Seen here is a mask of Tjuiu, made out of gilded cartonnage, that was also found in their tomb. Andreas F. Voegelin/AP/Museum Of Antiquities Basel hide caption

itoggle caption Andreas F. Voegelin/AP/Museum Of Antiquities Basel

Trout fishing is big business in Montana, bringing in tens of millions of dollars annually. Tom Murphy/Getty Images/National Geographic hide caption

itoggle caption Tom Murphy/Getty Images/National Geographic

Native Westslope cutthroat trout and bull trout swim in the cool waters of the Flathead River near Glacier National Park, Montana. Jonny Armstrong/USGS hide caption

itoggle caption Jonny Armstrong/USGS

The Large Stone Carving is the heaviest stone in the Forbidden City in Beijing. It was believed to have weighed more than 300 tons when it was first transported to the site between 1407 and 1420. DEA/ W. Buss/De Agostini/Getty Images hide caption

itoggle caption DEA/ W. Buss/De Agostini/Getty Images

The Rockaway section of Queens, in New York City, was hit hard by Superstorm Sandy. Many people in the neighborhood, shown here on October 30, 2012, lost power. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images

Researchers excavated the remains of five creatures who lived 1.8 million years ago, including this adult male skull. The excavation site, in Georgia in the former Soviet Union, was home to a remarkable cache of bones. Courtesy of Georgian National Museum hide caption

itoggle caption Courtesy of Georgian National Museum

A very old squished mosquito found in fossilized rock from Montana. Analysis of the insect's gut revealed telltale chemicals found in blood. PNAS hide caption

itoggle caption PNAS

Flooding brought down a house in Jamestown, Colo., on Sept. 18. Matthew Staver/Landov hide caption

itoggle caption Matthew Staver/Landov

A Thai medic checks bodies for forensic identity in Phang Nga province in southern of Thailand on Jan. 11, 2005. Thousands of people were killed in Thailand after a massive tsunami struck on Dec. 26, 2004. Pornchai Kittiwongsakul/AFP/Getty Images hide caption

itoggle caption Pornchai Kittiwongsakul/AFP/Getty Images