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Tag: environmental experiences

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  • Rats smile with their ears

    Rats smile with their ears

    Rats show happiness by lowering their ears, according to scientists who found that tickling the animals made their ears more droopy and pink.  Researchers from the University of Bern in Switzerland selected 15 male Lister hooded lab rats and subjected them to two types of environmental experiences they labelled as either positive or negative.  The …

    December 18, 2016