01:24 GMT +326 March 2019
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    Tree Treatment: Bears Love Rubbing Their Furry Backs Against Trunks

    CC BY-SA 2.0 / mackenzie and john / growling bear
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    It is always entertaining to watch a big brown bear rub its back against a tree trunk; we can relate to the furry animals having an itch that needs to be scratched.

    While bears look almost human scratching their backs, the reality may be somewhat less intuitive. Live Science cited scholars relaying speculations that the rubbing moves that bears make have a territorial purpose — male bears will then detect the smell of another animal. This may serve as a sign that the other bear is still somewhere not far away. Therefore, other creatures shouldn't challenge it to a fight, and should just back away immediately. 

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