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 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 Yacult.

This is Scientific American's 60-second science. I'm Erica Barris. Got a minute?

The dust that accumulates in the corners of your house does more than just cause allergies and aggravation.

It's also teeming with clues about where you live and who you live with. That's the finding of a study in the proceedings of the Royal Society B.

Researchers had volunteers at nearly 1,200 homes across the U.S. collect indoor and outdoor

dust samples. The average homes dust contains about 5,000 types of bacteria and 2,000 types of fungi.

The fungi gave away a lot about a home's location. Different regions

have different fungal populations, and thus so do houses within those regions. For example,

dwellings around the Great Lakes had very different fungi than did homes in Arizona,

because most household fungi originate outside and come in either on people's

clothes or through windows and doors. As for the bacteria, those were strong indicators of the

identity of the home's residents. Much of the bacteria was shed by the human body and was a

pretty good indicator of a home's gender ratio. The single-celled organisms also showed

whether a pet shared the home. Cats and dogs make their own contributions to the indoor

bacterial menagerie. The research could inform forensic investigations and allergy studies.

In the meantime, what can we take from these findings? Well, you can clean up dust,

but you can't change its composition. That is, unless you move, or make some changes in the pets

and people you live with. Thanks for the minute. For Scientific Americans' 60 Second Science,

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