How Dogs "See" The World With Their Sense Of Smell

Feb 9, 2015
TedEd creates videos that never disappoint, and this video on dogs' ability to "see" with their noses by Alexandra Horowitz is no exception. Very different than their human friends who mainly rely on sight as the main sense, dogs rely on their noses.

Dogs are estimated to have stronger olfactory senses than humans, anywhere from 10,000 to 100,000 times. Different dogs smell at different levels. For example, a human has 5 million scent receptors compared to a dachshund having 125 million and a bloodhound with 300 million.

To put it all in perspective, on a clear day, if a human could see one-third of a mile in the distance, a dog would be able to see 3,000 miles.
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