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        "description": "<p>A narwhal's tusk makes it weird among whales. It's actually a tooth that can reach ten feet in length, and scientists have numerous theories about its powers and purpose.</p>", 
        "is_us_only": "false", 
        "title": "World's Weirdest: Narwhals", 
        "url": "http://video.nationalgeographic.com/video/animals/mammals-animals/whales/weirdest-narwhals/", 
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            "link": [
                {
                    "url": "http://animals.nationalgeographic.com/animals/mammals/narwhal/", 
                    "name": "Narwhal Animal Profile"
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            ]
        }, 
        "credit": "National Geographic", 
        "smil": "http://video.nationalgeographic.com/video/player/data/xml/weirdest-narwhals.smil", 
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        "HTML5src": "/video/player/media-mp4/weirdest-narwhals/mp4/variant-playlist.m3u8", 
        "still": "http://video.nationalgeographic.com/exposure/core_media/ngphoto/image/58995_0_616x346.jpg", 
        "transcript": "<p>Male narwhals can weigh nearly two tons, with bodies up to 16 feet long.</p><p>But it's their tusks that make them weird among whales. The tusk is actually a single gigantic tooth that can reach 10 feet in length.</p><p>But why swing such a big sword?\u00a0 Scientists aren't exactly sure.</p><p>Narwhals are an animal of misinformation and mystery, dating back to the Middle Ages when their tusks were fobbed off to royalty as unicorn horns.</p><p>Is it used to impale their prey?\u00a0 No!</p><p>Narwhals can dive more than a half mile down to the ocean floor to feast on cod, squid and cuttlefish. No stabbing or goring required.</p><p>Is it used to poke around on that dark ocean floor? Possible, but improbable.\u00a0 Narwhals, like their dolphin cousins, use sonar to guide them through the depths.\u00a0 The tusk is jam-packed with nerve endings.</p><p>Some scientists argue it acts as some kind of sensor, that would be one insightful incisor.</p><p>But it's the males who predominantly sport the tusks.</p><p>If the tusks had a survival advantage, the females would also be long in the tooth.</p><p>Some scientists believe this means the tusk serves the same function as a deer's antlers or a teenager's hotrod: a way to show who's the fittest male around.</p><p>Males occasionally cross swords. That's tickling the ivories.\u00a0 But whether it's a joust or a jaw session is anybody's guess.</p><p>And the narwhals aren't telling.</p>", 
        "id": "weirdest-narwhals"
    }
}