Magellanic penguins strut their stuff on the rocky shoreline of Argentina's Punta Tombo, home to the largest colony of the birds in the world. Craig Lovell/Corbis hide caption

toggle caption Craig Lovell/Corbis
Changing Climate In Argentina Is Killing Penguin Chicks
  • Download
  • <iframe src="https://www.npr.org/player/embed/268908419/268964685" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

A close-up schematic of leaks near the U.S. Capitol shows high leak densities east of the building, but few leaks over the National Mall, where very few natural gas pipelines exist. Robert B. Jackson/Environmental Science and Technology hide caption

toggle caption Robert B. Jackson/Environmental Science and Technology
About 6,000 Natural Gas Leaks Found In D.C.'s Aging Pipes
  • Download
  • <iframe src="https://www.npr.org/player/embed/262911327/263123803" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Ask not for whom the wolf stalks ... Holly Kuchera/iStockphoto hide caption

toggle caption Holly Kuchera/iStockphoto
When Big Carnivores Go Down, Even Vegetarians Take The Hit
  • Download
  • <iframe src="https://www.npr.org/player/embed/261120968/261271918" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Say aaaaaah! Dental caries and other signs of oral disease are plain to see in the upper teeth of this hunter-gatherer, between 14,000 and 15,000 years old. The findings challenge the idea that the original paleo diet was inherently healthy, says paleo-anthropologist Louise Humphrey. It all depended, she says, on what wild foods were available. Courtesy of Isabelle De Groote hide caption

toggle caption Courtesy of Isabelle De Groote
Looks Like The Paleo Diet Wasn't Always So Hot For Ancient Teeth
  • Download
  • <iframe src="https://www.npr.org/player/embed/260185944/260290126" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

Even when a flood obliterates homes, as Superstorm Sandy did in 2012 in the Rockaway neighborhood of Queens, N.Y., the urge to rebuild can be strong. Spencer Platt/Getty Images hide caption

toggle caption Spencer Platt/Getty Images
Federal Flood Insurance Program Drowning In Debt. Who Will Pay?
  • Download
  • <iframe src="https://www.npr.org/player/embed/258706269/258857074" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Florida's Mangroves Move North As Temperatures Rise
  • Download
  • <iframe src="https://www.npr.org/player/embed/258699479/258699480" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption Linda Nicholas/The Field Museum
Centuries Before China's 'Great Wall,' There Was Another
  • Download
  • <iframe src="https://www.npr.org/player/embed/255550362/258048865" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption Werner Rudhart/DPA /Landov
More People Have More To Eat, But It's Not All Good News
  • Download
  • <iframe src="https://www.npr.org/player/embed/256894305/257268975" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption Bence Viola/Nature
Mixing It Up 50,000 Years Ago — Who Slept With Whom?
  • Download
  • <iframe src="https://www.npr.org/player/embed/252046939/255288942" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript
Scientists Battle Over Fate Of Yellowstone's Grizzlies
  • Download
  • <iframe src="https://www.npr.org/player/embed/250656133/250656112" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption UT Austin Institute for Geophysics
Long Island Wins Ultimate Faceoff Against Hurricane Sandy
  • Download
  • <iframe src="https://www.npr.org/player/embed/250468546/250554775" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption Emmett Tullos/Flickr
U.S. May Be Producing 50 Percent More Methane Than EPA Thinks
  • Download
  • <iframe src="https://www.npr.org/player/embed/246783825/247222102" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle caption David P. Gilkey/NPR
How And Where Should We Rebuild After Natural Disasters?
  • Download
  • <iframe src="https://www.npr.org/player/embed/245949244/246015345" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript

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

toggle 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

toggle caption Tom Murphy/Getty Images/National Geographic
A Rancher And A Conservationist Forge An Unlikely Alliance
  • Download
  • <iframe src="https://www.npr.org/player/embed/245051691/245358663" width="100%" height="290" frameborder="0" scrolling="no" title="NPR embedded audio player">
  • Transcript