Scientists Find Africa's Longest Land Migration: Zebras' 350-Mile Trek
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Fishermen drag a net in Lake Malawi in 2012. About the size of New Jersey, the lake is home to hundreds of fish species and is considered one of the most biologically diverse lakes in the world. Ding Haitao/Xinhua/Landov hide caption

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Thriving Towns In East Africa Are Good News For A Parasitic Worm
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Clint Muhlfeld, an aquatic ecologist with the USGS, holds a native Westslope cutthroat trout in Glacier National Park. Noah Clayton/USGS hide caption

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Hybrid Trout Threaten Montana's Native Cutthroats
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Grand Canyon Officials Want To Evict Bison From Park
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Alaska Man's Job Is To Keep Skies Bird-Free For Airplane Takeoffs
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The World Trade Organization has maintained the EU's ban on products from Canada's seal hunt. Earlier this year, activists from PETA simulated slaughtering a seal in a protest at the Canadian Consulate in Los Angeles. Joe Klamar/AFP/Getty Images hide caption

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The egg definitely came before the chicken in this case — the skeleton is from a modern adult kiwi, the egg from its much bigger, long-extinct cousin, Aepyornis maximus. Kyle Davis and Paul Scofield/Canterbury Museum hide caption

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Big Flightless Birds Come From High-Flying Ancestors
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In this image from the June issue of National Geographic, Jose Armenta and his wife, Eliana, relax with their Boston terriers Oreo and Sassy, and Zenit, a German shepherd they adopted from the Marines. Adam Ferguson/National Geographic hide caption

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Civilian Life Taught This Military Dog Some New Tricks
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When your best friend weighs several tons, sometimes a trunk hug will have to do. Scott Raffe/Courtesy of Shotwell Media hide caption

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For A Showman Larger Than Life, An Even Bigger Best Friend
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Unlike humans, an octopus doesn't have constant awareness of each arm's location. Each appendage sort of has a "mind of its own," research shows. Joe Parks/Flickr hide caption

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Why This Octopus Isn't Stuck-Up
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