Dogs can smell when we're stressed, study suggests

The physiological processes associated with an acute psychological stress response produce changes in human breath and sweat that dogs can detect with an accuracy of 93.75%, according to a new study published this week in ...

First report of dorsal navigation in a flying insect

People—who get lost easily in the extraordinary darkness of a tropical forest—have much to learn from a bee that can find its way home in conditions 10 times dimmer than starlight. Researchers at the Smithsonian Tropical ...

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