Dogs have an amazing sense of smell with an amazing 300 million receptors compared to humans’ paltry 6 million.

This sensational smell advantage makes canines capable of being taught to sniff out some pretty amazing substances. Among those are:

One – The remains of murdered or accidentally killed humans – Dogs have been used to help solve crimes, in some instances in cases that had long gone cold. But in an extraordinary feat, dogs were able to find human remains at an archeological site in a Croatian mountain range that was 3000 years old!

Two – Cow fertility – Dairy farmers need to know when their cows are in estrus, as they use artificial insemination to produce pregnancies. Before the use of dogs, they had to rely on observing cows’ behaviors, which were not always accurate predictors. Turns out that dogs can detect fertility in cow’s milk an astounding 99% of the time.

Three – People carrying bombs – Researchers at Auburn University trained Labrador Retrievers to detect the scent in the air of people who were wearing explosives on their bodies and were out to harm people at venues such as airports and concerts. 

Four – Snakes – Invasive pythons have become quite a problem in Florida’s Everglades National Park, as they are decimating native birds and wildlife. Two dogs, Jake and Ivy, have been trained to sniff them out.

Five – Coronavirus – Eight Labrador Retrievers are being trained at the University of Pennsylvania to detect SARS-CoV2, the virus that causes COVVID-19. It’s hoped that these dogs will be able to screen airport travelers, concert goers and hospital patients and staff.

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