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.

Yachtold 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 Yachtol, visit yacult.co.

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

Why, hello, fellow math nerds. This is Tulika Bose, senior multimedia editor at Scientific American.

If you miss that famous Scientific American Martin Gardner column from the 1950s,

never fear we have some great mathematics content coming your way in the new year.

But for now, I'd like to leave you with one of my favorite stories from this last year, hosted

and reported by the incredibly talented Alison Partial.

It tracks the story of Cleo, a mysterious user on a math stack exchange, known for unleashing

a series of rapid-fire drive-by answers on the forum without showing any of her work.

Between 2013 and 2015, the username's Cleo did this about 37 times,

driving everyone with graduate-level STEM degrees a little, well, wild.

But who was Cleo?

Allison takes us into the story.

It's a bit of an urban legend in mathematics. There's a sort of a romance of a story in a way.

I'm Alison Partial. You're listening to Science Quickly. Today, we've got an episode about a mysterious figure in the online math world.

They disappeared years ago, but they're still sparking debate and speculation.

We all love a good puzzle. Some people have their crosswords.

Some people play Sudoku.

Other people are still doing Wordle. But Ron Gordon, a patent agent and a former physicist in Massachusetts, does hardcore calculus.

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