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.com.j.

That's Y-A-K-U-L-T dot-C-O-J-P.

When it comes to a guide for your gut, count on YacL.

It's Pye Day.

This is Scientific American Science Quickly. I'm Jeff Delvisio.

Well, another 3.1415926-53558-9-97-9323-8-9328-8462.

You get the idea.

Day is upon this.

It's that special day in March when we collectively celebrate the irrational number

represented by the Greek symbol Pi.

In its simplest definition,

pie is the ratio of a circle circumference to its diameter.

Pi shows up everywhere in mathematics.

In 1960, our illustrious then-mathematical games columnist, Martin Gardner, quoted mathematician Augustus de Morgan, speaking of Pi as this mysterious 3.14159, which comes in at every door

and window and down every chimney.

Pie shows up outside of its circular home in the motions of springs and pendulums, in probability and in our 365-day calendar.

It shows up in nature everywhere. There's a circle or spiral, like in planets and DNA.

Pie even shows up in the bends of rivers, relating to their sinuosity, specifically.

The existence of pie has also led to mass baking on March 14th and to pizza discounts. Humans have

...