Chimp friendships are largely initiated by grooming. They are “popping pimples; they’re looking at little scabs; they’re scratching things,” Dr. Lewis said, behaviors that release bonding hormones like oxytocin.
The seasonal scarcity of fruits and vegetables drives bearded capuchin monkeys to significantly increase the hunting of small vertebrates, a behavior that researchers directly link to survival strategies that the ancestors of human beings may have used during periods of climatic instability. This is the main conclusion of a study published in PLOS One by […]
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