Christopher Joyce http://nhpr.org en Scientists Find Africa's Longest Land Migration: Zebras' 350-Mile Trek http://nhpr.org/post/scientists-find-africas-longest-migration-zebras-350-mile-trek Wildlife biologists have discovered the longest known terrestrial migration in Africa: some 350 miles across southern Africa by huge herds of zebras. Large mammal migration in Africa has generally been hindered by the subdivision and fencing of land. However, this one remains possible because it takes place in a unique, multi-country wildlife corridor. <div class="fullattribution">Copyright 2014 NPR. Thu, 29 May 2014 20:35:00 +0000 Christopher Joyce 49405 at http://nhpr.org Hybrid Trout Threaten Montana's Native Cutthroats http://nhpr.org/post/hybrid-trout-threaten-montanas-native-cutthroats Many parts of the U.S. have been getting warmer over the past several decades, and also experiencing persistent drought. Wildlife often can't adjust. Among the species that are struggling is one of the American West's most highly prized fish — the <a href="http://www.nrmsc.usgs.gov/research/WCT">cutthroat trout</a>.<p>In springtime, you can find young cutthroats in the tiny streams of Montana's Shields Basin. Tue, 27 May 2014 21:09:00 +0000 Christopher Joyce 49262 at http://nhpr.org Hybrid Trout Threaten Montana's Native Cutthroats Methane-Producing Microbes Caused 'The Great Dying' http://nhpr.org/post/methane-producing-microbes-caused-great-dying Transcript <p>STEVE INSKEEP, HOST: <p>It's MORNING EDITION from NPR News. I'm Steve Inskeep.<p>DAVID GREENE, HOST: <p>And I'm David Greene. Good morning. The biggest extinction the Earth has ever seen took place 250 million years ago and it remains something of a mystery. Scientists suspected giant volcanoes or perhaps an asteroid caused it, but NPR's Christopher Joyce has seen new research suggesting the cause might not have been so cataclysmic - maybe something much more subtle.<p>CHRISTOPHER JOYCE, BYLINE: It's sometimes called the Great Dying. Tue, 01 Apr 2014 11:00:00 +0000 Christopher Joyce 45965 at http://nhpr.org About 6,000 Natural Gas Leaks Found In D.C.'s Aging Pipes http://nhpr.org/post/about-6000-natural-gas-leaks-found-dcs-aging-pipes The nation's capital is a pretty old city by American standards. It dates back to the late 18th century. Despite frequent face-lifts, parts of it are wearing out — for example, its underground gas pipelines. New research shows that Washington, D.C., suffers from thousands of leaks of natural gas.<p>"We drove 1,500 road miles in Washington, D.C., and found about 6,000 leaks," says <a href="http://biology.duke.edu/jackson/">Robert Jackson</a>, an ecologist and environmental scientist at Duke University. Fri, 17 Jan 2014 01:07:00 +0000 Christopher Joyce 41999 at http://nhpr.org About 6,000 Natural Gas Leaks Found In D.C.'s Aging Pipes Looks Like The Paleo Diet Wasn't Always So Hot For Ancient Teeth http://nhpr.org/post/looks-paleo-diet-wasnt-so-hot-ancient-hunters-teeth One of the hinge points in human history was the <a href="http://www.npr.org/blogs/thesalt/2013/07/08/198453031/farming-got-hip-in-iran-some-12-000-years-ago-ancient-seeds-reveal">invention of agriculture</a>. It led to large communities, monumental architecture and complex societies. It also led to tooth decay.<p>When hunter-gatherers started adding grains and starches to their diet, it brought about the "age of cavities." At least that's <a href="http://www.npr.org/blogs/health/2013/02/24/172688806/ancient-chompers-were-healthier-than-ours">what a lot of people thought</a>. Mon, 06 Jan 2014 20:22:00 +0000 Christopher Joyce 41330 at http://nhpr.org Looks Like The Paleo Diet Wasn't Always So Hot For Ancient Teeth More People Have More To Eat, But It's Not All Good News http://nhpr.org/post/more-people-have-more-eat-its-not-all-good-news Among the things to celebrate this holiday season is the fact that there are fewer hungry people in the world. Just how many? Well, since 1965, researchers in Europe have been tracking the world's food supply and where it's going.<p>The good news is: The percentage of the world's population getting what the researchers say is a sufficient diet has grown from 30 percent to 61 percent.<p>In 1965, a majority of the world survived on less than 2,000 calories a day per person. This was especially true in parts of the Middle East, Africa, Latin America, China and Southeast Asia. Thu, 26 Dec 2013 08:18:00 +0000 Christopher Joyce 40772 at http://nhpr.org More People Have More To Eat, But It's Not All Good News Mixing It Up 50,000 Years Ago — Who Slept With Whom? http://nhpr.org/post/mixing-it-50000-years-ago-who-slept-whom In a remote cave in Siberia, scientists have found a 50,000-year-old bone from a toe that tells a story about life — and love — among some of the earliest humans.<p>They did it by analyzing DNA from that bone.<p>Back in 2010, scientists <a href="http://www.npr.org/2010/12/23/132243268/ancient-bones-dna-suggests-new-human-ancestors">stunned the world</a> by retrieving recognizable DNA from a Neanderthal bone that was tens of thousands of years old. They compared it with modern human DNA, and — what do you know? There's some Neanderthal DNA in many of us. Thu, 19 Dec 2013 00:57:00 +0000 Christopher Joyce 40419 at http://nhpr.org Mixing It Up 50,000 Years Ago — Who Slept With Whom? Scientists Battle Over Fate Of Yellowstone's Grizzlies http://nhpr.org/post/scientists-battle-over-fate-yellowstones-grizzlies Transcript <p>RENEE MONTAGNE, HOST: <p>The North America's grizzly bear is protected under the Endangered Species Act. Its population was virtually wiped out in the lower 48 states. One group of bears, though, may soon lose that protection - the Yellowstone grizzly. Some scientists say that group is thriving. Others disagree. NPR's Christopher Joyce has more on the battle over the bear.<p>CHRISTOPHER JOYCE, BYLINE: The U.S. Fri, 13 Dec 2013 12:52:00 +0000 Christopher Joyce 40076 at http://nhpr.org Long Island Wins Ultimate Faceoff Against Hurricane Sandy http://nhpr.org/post/long-island-wins-ultimate-faceoff-against-hurricane-sandy Hurricane Sandy last year did more harm to coastal cities and homes than any hurricane in U.S. history, except Katrina. Most of that damage has been repaired. But there's other damage that people can't see to the underwater coastline, known as the shore face.<p>Apparently, Long Island's shore face did remarkably well against the storm of the 21st century.<p>The shore face is the underwater slope that runs up to the shore. Its shape influences how fast and high water moves onto land. Sandy pushed water up the shore face and into towns and bays. Thu, 12 Dec 2013 22:48:00 +0000 Christopher Joyce 40056 at http://nhpr.org Long Island Wins Ultimate Faceoff Against Hurricane Sandy U.S. May Be Producing 50 Percent More Methane Than EPA Thinks http://nhpr.org/post/us-may-be-producing-50-percent-more-methane-epa-thinks Methane is the source of the gas we burn in stoves. You can also use it to make plastics, antifreeze or fertilizer. It comes out of underground deposits, but it also seeps up from swamps, landfills, even the stomachs of cows.<p>And while methane is valuable, a lot of it gets up into the atmosphere, where it becomes a very damaging greenhouse gas.<p>Scientists have been trying to find out, with varying success, exactly how much of this climate-warming gas gets into the atmosphere. Mon, 25 Nov 2013 23:09:00 +0000 Christopher Joyce 39106 at http://nhpr.org U.S. May Be Producing 50 Percent More Methane Than EPA Thinks Meat Mummies: How Ancient Egyptians Prepared Feasts For Afterlife http://nhpr.org/post/meat-mummies-how-ancient-egyptians-prepared-feasts-afterlife Meat mummies.<p>It's a word pairing that is, I dare say, pretty rare. Who among us has heard those two words together? What, indeed, could a "meat mummy" be?<p>Indiana Jones, of course, would have known the answer right away. A meat mummy is a section of animal prepared as if for eating, then bandaged and placed in a sarcophagus by ancient Egyptians. Egyptian royalty, even after death, got hungry. And royalty deserved something more than oats and tubers. Mon, 18 Nov 2013 21:16:00 +0000 Christopher Joyce 38746 at http://nhpr.org Meat Mummies: How Ancient Egyptians Prepared Feasts For Afterlife A Rancher And A Conservationist Forge An Unlikely Alliance http://nhpr.org/post/rancher-and-conservationist-forge-unlikely-alliance Trout fishing is a magnet that draws people from around the world to places like Ovando, Mont. Just ask the owner of Blackfoot Angler and Supplies, Kathy Schoendoerfer.<p>"Every state in the nation has been through this little shop in Ovando, Montana, population 50," says Schoendoerfer with a mix of pride and perhaps a little fatigue. "And we've also had everybody from Russia, Latvia. We get a lot of Canadians, France, Finland, Brazil, Scotland, Germany, South Africa. We get a lot of business out here. You know, fly-fishing is huge."<p>But Western trout may be in trouble. Fri, 15 Nov 2013 08:04:00 +0000 Christopher Joyce 38575 at http://nhpr.org A Rancher And A Conservationist Forge An Unlikely Alliance As Climate Warms American West, Iconic Trout In Jeopardy http://nhpr.org/post/climate-warms-american-west-iconic-trout-jeopardy In the mountain streams of the American West, the trout rules. People don't just catch this fish; they honor it. And spend lots of money pursuing it.<p>But some western trout may be in trouble. Rivers and streams are getting warmer and there's often less water in them. Scientists suspect a changing climate is threatening this iconic fish.<p>I joined two such scientists from the U.S. Thu, 14 Nov 2013 08:07:00 +0000 Christopher Joyce 38499 at http://nhpr.org As Climate Warms American West, Iconic Trout In Jeopardy How'd They Do That? The Story Of A Giant Rock And A Road Of Ice http://nhpr.org/post/howd-they-do-story-giant-rock-and-road-ice Great works of ancient engineering, like the Pyramids or Stonehenge, inspire awe in every beholder. But some onlookers also get inspired to figure out exactly how these structures were made.<p><a href="http://www.princeton.edu/mae/people/faculty/stone/">Howard Stone</a>, an engineer from Princeton University, had such a moment in Beijing's Forbidden City — a city-within-a-city of palaces and temples built in the 15th and 16th centuries. A carved, 300-ton slab that formed a ramp to one structure particularly caught Stone's eye. Mon, 04 Nov 2013 22:13:00 +0000 Christopher Joyce 37950 at http://nhpr.org How'd They Do That? The Story Of A Giant Rock And A Road Of Ice In Sandy's Wake, Flood Zones And Insurance Rates Re-Examined http://nhpr.org/post/sandys-wake-fema-re-examines-flood-insurance-rates When Sandy blew into East Coast communities a year ago, it was flooding that did the most damage.<p>That's in part because the average sea level has risen over the past century — about a foot along the mid-Atlantic coast. That made it easier for the storm to push the ocean onto the land.<p>And scientists say there will be many more Sandy-style storms — that is, torrential rain and wind that create heavy coastal flooding — and they'll be more frequent than in the past. Wed, 30 Oct 2013 20:08:00 +0000 Christopher Joyce 37667 at http://nhpr.org In Sandy's Wake, Flood Zones And Insurance Rates Re-Examined