Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

.jp. That's Y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacolt.

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

Old Yeller was a great smeller, and dogs in general have superior smelling abilities.

They detect dead bodies, illegal drugs, and explosives, even cancer.

But dogs don't just have great olfactory gear.

Another reason they're amazing chemical detectors is the sniff.

And it turns out that almost every breed of dog does this at about 5 hertz, five times a second.

Matthew Stamate, a mechanical engineer and fluid dynamist at the National Institute of Standards and Technology.

Sniffing, he says, is really a two-part process.

Inspiration, expiration, right? Inhale, exhale, inhale, exhale.

That second part, the exhale is key.

So when the dog is actively sampling or sniffing on the ground, there is a turbulent air

jet that exits each nostril during the exhale phase. Just like when you and I exhale, there's an airjet that comes out of our nostrils, right?

But the dog is kind of down on the ground, and those air jets are vectored down and towards its rear.

And in the world of fluid dynamics, if I pulse an air jet in one direction, I basically pull air with it.

So the dog's actually creating a pressure differential that effectively pulls new sense towards its nose.

Staymates and his colleagues discovered that effect using a 3D printed model of a Labrador

retriever's nose, which they tested with fluid dynamics equipment.

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