Sharks "smell in
stereo."
You're no doubt familiar with a shark's
ability to detect even small amounts of blood in the water from as far as a
quarter mile away. However, what you may not realize is that this is due to the
animal's ability to "smell in stereo."
As
reported by Nature in 2010: researchers found
that sharks can detect tiny delays in the time it takes for a scent to reach
one nostril compared to the other—even when it's just a fraction of a second.
This delay allows them to determine from which side the scent came and in
response, they can head that way in search of prey.
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