Christopher Joyce http://kttz.org en An Icy Solution To The Mystery Of The Slithering Stones http://kttz.org/post/icy-solution-mystery-slithering-stones A century ago, miners working in California's Death Valley reported seeing boulders on the desert floor with long trails behind them — as if the stones had been pushed across the sand. Thu, 28 Aug 2014 07:46:00 +0000 Christopher Joyce 50374 at http://kttz.org An Icy Solution To The Mystery Of The Slithering Stones There's A Big Leak In America's Water Tower http://kttz.org/post/theres-big-leak-americas-water-tower The northern arm of the Rocky Mountains is sometimes called "the crown of the continent," and its jewels are glaciers and snowfields that irrigate large parts of North America during spring thaw.<p>But the region is getting warmer, even faster than the rest of the world. Scientists now say warming is scrambling the complex relationship between water and nature and could threaten some species with extinction as well as bring hardship to ranchers and farmers already suffering from prolonged drought.<p>To see how this vast natural irrigation system works, it's best to fly over it. Wed, 27 Aug 2014 19:53:00 +0000 Christopher Joyce 50354 at http://kttz.org There's A Big Leak In America's Water Tower Elephant Slaughter, African Slavery And America's Pianos http://kttz.org/post/elephant-slaughter-african-slavery-and-americas-pianos The illegal trade in ivory from African elephants has tripled in the past 15 years, to the extent that biologists <a href="http://www.npr.org/2013/03/06/173508369/elephant-poaching-pushes-species-to-brink-of-extinction">fear</a> for the creatures' future existence.<p>Most of the ivory is sold in China and Vietnam, and these days the U.S. government and international conservation groups urge those countries to <a href="http://www.npr.org/blogs/parallels/2014/08/05/337973375/african-countries-say-they-need-help-to-stop-elephant-poaching">arrest the traffickers</a>. Mon, 18 Aug 2014 17:11:00 +0000 Christopher Joyce 49861 at http://kttz.org Elephant Slaughter, African Slavery And America's Pianos Underwater Meadows Might Serve As Antacid For Acid Seas http://kttz.org/post/california-experiments-fix-acidifying-oceans 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 47924 at http://kttz.org Underwater Meadows Might Serve As Antacid For Acid Seas Dance Of Human Evolution Was Herky-Jerky, Fossils Suggest http://kttz.org/post/dance-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 47308 at http://kttz.org Dance Of Human Evolution Was Herky-Jerky, Fossils Suggest