LISTEN: Scientists have solved one of nature’s greatest mysteries: How do big bull elks produce an eerie shriek that sounds like the Ringwraiths from The Lord of the Rings?
Bull elks produce an eerie shriek that sounds like the Ringwraiths from "Lord of the Rings." Listen: on.natgeo.com/2n2wlpO
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National Geographic (@NatGeo) March 05, 2017
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