Cortisol

Cortisol in shelter dog hair shows signs of stress

Despite the good care, a shelter can be a stressful environment for dogs. Researchers at Utrecht University investigated if the amount of the hormone cortisol …

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birders

Some birds steal hair from living mammals, study finds

Dozens of online videos document an unusual behaviour among tufted titmice and their closest bird kin. A bird will land on an unsuspecting mammal and, …

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