Winter is Coming, and Hamsters Are Getting Feisty

What makes female Siberian hamsters ready to duke it out in the winter? Melatonin.
The same hormone gaining popularity as a natural sleep aid plays a major role in seasonal aggression in female hamsters, according to new research. The study, published this week in the Proceedings of the Royal Academy B, is a collaboration between the Indiana University Bloomington College of Arts and Sciences’ departments of Biology and Psychological and Brain Sciences. 
And just as a reminder: Winter is com

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