Christopher Joyce en Underwater Meadows Might Serve As Antacid For Acid Seas The world's oceans are changing — chemically changing. As people put more carbon dioxide into the atmosphere, the oceans absorb more of it, and that's making the water more acidic.<p>The effects are subtle in most places, but scientists say that if this continues, it could be a disaster for marine life.<p>In fact, some scientists have taken a glimpse of what a more acidic ocean might look like. Tue, 15 Jul 2014 09:43:00 +0000 Christopher Joyce 64436 at Dance Of Human Evolution Was Herky-Jerky, Fossils Suggest A trio of anthropologists has decided it's time to rewrite the story of human evolution.<p>That narrative has always been a work in progress, because almost every time scientists dig up a new fossil bone or a stone tool, it adds a new twist to the story. Discoveries lead to new arguments over the details of how we became who we are.<p>But anthropologists generally agree on this much: A little more than 2 million years ago in Africa, the human lineage emerged. Fri, 04 Jul 2014 07:37:00 +0000 Christopher Joyce 63850 at Maybe Dinosaurs Were A Coldblooded, Warmblooded Mix If you go to a zoo on a cold day and watch the snakes, you'll see what it means to be <a href="">coldblooded</a>. Not much action going on — most reptiles and other coldblooded creatures take on the temperature of their surroundings, so they tend to be most sluggish when the outside temperature is cool. The monkeys, however, act like they've had one too many cappuccinos. Thu, 12 Jun 2014 18:03:00 +0000 Christopher Joyce 62372 at Spiders Tune In To Web's Music To Size Up Meals And Mates <p></p><p></p> Tue, 10 Jun 2014 07:48:00 +0000 Christopher Joyce 62208 at Scientists Find Africa's Longest Land 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 61666 at Hybrid Trout Threaten Montana's 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="">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 61531 at Former Commando Turns Conservationist To Save Elephants Of Dzanga Bai <p></p> Fri, 09 May 2014 07:34:00 +0000 Christopher Joyce 60401 at Civil War Invades An Elephant Sanctuary: One Researcher's Escape Ivory poachers are killing some 22,000 African elephants a year. Among the recent casualties was a group of rare <a href="">forest elephants</a> in the Central African Republic.<p>Those elephants were featured in an NPR program, Radio Expeditions, in 2002, when former NPR host and correspondent Alex Chadwick and sound engineer Bill McQuay went to central Africa to <a href="">record them</a>.<p>The Central African Republic was peaceful back then. Thu, 08 May 2014 20:37:27 +0000 Christopher Joyce 60342 at A T. Rex Treks To Washington For A Shot At Fame This week, scientists at the Smithsonian's National Museum of Natural History will start unpacking some rare and precious cargo. It's something the Smithsonian has never had before — a nearly complete skeleton of a Tyrannosaurus rex.<p>Most people don't know it, but the T. rex that's standing tall in the Natural History Museum in Washington, D.C., is a fake — a cast, a copy of the bones. It's an accurate replica, but for decades the Smithsonian has coveted a real skeleton of a T. Wed, 16 Apr 2014 07:43:00 +0000 Christopher Joyce 58611 at Methane-Producing Microbes Caused 'The 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 57465 at