Humans can distinguish at least one trillion odors, but we don’t necessarily make full use of that capability. For wild animals, where smell is associated with survival, scents may provide life or ...

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Gut bacteria create smells that influence behavior, shaping aggression and social hierarchy through the brain.

Walk through an Australian eucalyptus forest and a sharp, minty smell may drift through the air. Eucalyptus leaves release aromatic oils that spread through the forest, especially on warm days. Koalas ...

As mammals with large brains, humans experience smell as a powerful sensory experience that’s closely linked with memory. The smell of baking bread may take us back to a moment in Paris. A perfumy ...