Why Do Koalas Hug Trees?

As if koalas could be any more adorable, they also tend to spend a lot of their time hugging trees. But why? Quick Questions has the answer!

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Sources:

http://rsbl.royalsocietypublishing.org/content/10/6/20140235

http://www.theguardian.com/environment/2014/jun/04/koalas-have-learned-a-new-trick-to-beat-the-heat-scientists-say

http://www.wired.com/2014/06/science-graphic-of-the-week-adorable-chart-shows-why-koalas-hug-trees/

http://www.australiangeographic.com.au/news/2014/06/koalas-hug-trees-to-keep-cool

Briscoe NJ, Handasyde KA, Griffiths SR, Porter WP, Krockenberger A, Kearney MR. Tree-hugging koalas demonstrate a novel thermoregulatory mechanism for arboreal mammals. Biology Letters 2014; 10. Doi: 10.1098/rsbl.2014.0235