Interesting article
Quote
Human noses 'can detect danger'
Our noses can quickly learn to link even subtle changes in smell with danger, claim scientists.
Volunteers who could not differentiate between two similar smells found they could do it easily after being given a mild electric shock alongside one.
Brain scans confirmed the change in the "smelling" part of the brain.
The US research, published in the journal Science, suggests our distant ancestors evolved the ability to keep us away from predators.
From [
news.bbc.co.uk]
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