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.jp. 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.

Walking in New York City is almost a competitive sport.

Hey, I'm walking here. I'm walking here. And people in cities really do walk faster than their

country counterparts, 2.8 feet per second faster, according to a worldwide study in the 1970s.

But that speedier pace of life extends to other aspects of city living too.

There's more inventions per capita in large cities or more mobile telephony usage in larger cities.

Love Varsna, an information theorist at the University of Illinois at Urbana-Champaign.

He says you might expect Twitter use to increase in larger cities too,

but after analyzing two and a half million tweets from 50 U.S. cities,

his team concluded the opposite is true.

There's actually less tweeting per capita as population rises.

But those who do tweet in big cities are more prolific, tweeting more

often on average than their small town counterparts. And so what we discovered is that there's

kind of a core of people that we call town tweeters that seem to emerge. And those people are actually

tweeting a lot. And then everyone else is not tweeting very much in large cities.

And so those, what we call town tweeters, are essentially serving as an information broadcast infrastructure.

Their analysis is in the journal Sage Open.

...