Dogs can smell when you feel...
Thursday, May 16, 2024
Make every day more interesting. Each day a surprising fact opens a world of fascinating information for you to explore. Did you know that….? 
| Original photo by Unsplash+ via Getty Images |
| Dogs can smell when people are stressed. | Dogs have been trained to sniff drugs and bombs, but their most impressive olfactory feat might be their ability to smell when people are stressed. Though this likely comes as little surprise to dog owners, who are often well acquainted with their canines' emotional intelligence, it's still an impressive skill. A recent study showed that acute psychological stress produces changes in the odor profile of human sweat and breath, which dogs can detect with 93.75% accuracy. This was determined over the course of 720 trials in which samples were taken before and after people performed a high-stress task that increased their blood pressure and heart rate. The most skilled pup in the trials was able to detect the difference between samples at 96.88% accuracy.
To say that dogs' sense of smell is stronger than ours would be an understatement, even though the human sense of smell is better than was long believed. Some dogs have hundreds of millions of smell receptors in their noses (humans have 5 million to 6 million), and the olfactory bulb in their brain is 30 times larger than ours. Overall, dog noses are thought to be 100,000 times more sensitive than ours, which is either a blessing or a curse depending on what you'd be smelling at any given time.
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 | | Dogs can smell separately with each nostril. | | |
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| Dogs can smell separately with each nostril. |  |  |
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| The dog breed with the strongest sense of smell is the __. |  |
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 | Numbers Don't Lie |
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 | | Scent receptors in a bloodhound's nose, the most of any breed | | 300 million |
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| | | Species of mammals that can sense heat with their noses (dogs and vampire bats) | | 2 |
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| | Teaspoon's worth of sugar a dog can detect in a million gallons of water | | 1 |
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| | | Weeks it takes a dog to complete the explosive detection training program | | 10 |
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 | Dogs can also detect diseases in humans. |
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| Man's best friend has been known to be able to smell cancer for some time now, with a 2019 study showing that dogs (or at least three beagles in the study) had a 96.7% success rate detecting lung cancer. At the height of the pandemic, dogs proved equally adept at sniffing out COVID-19 in sweat samples taken from 335 people — including 31 who had yet to display symptoms. Dogs could detect samples from COVID-afflicted people with a 97% sensitivity rate. Other diseases canines have detected with a high level of accuracy include seizures, diabetes, migraines, and Parkinson's. | | |
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posted by June Lesley at 5:12 AM
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