The nose knows: Your sense of smell plays a critical role in signalling danger

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A new study has found that smell can alert human beings to danger and trigger a physical avoidance response.

The study, published in Proceedings of the National Academy of Sciences, investigated what happens in the brain when the central nervous system uses smell to recognise danger.

The research focused on the human olfactory bulb, the part of the brain where information about odours is processed.

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