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.j. That's y-A-K-U-L-T.co.jp. When it comes to a guide for your gut, count on Yacolt.

This is Scientific Americans' 60-second science. I'm Steve Merski.

Today, November 4th is National Bison Day, celebrating the animal that last year Congress and the President designated as the official national mammal of the United States.

For good reason, the American bison, also called the buffalo, is the iconic animal that helped

mold the ecology of the Great Plains and played a central role in the cultural life of multiple

tribes of Native Americans, including the Arapaho and Lakota.

Today's healthy bison herds owe a lot to time their ancestors spent in, of all places, the Bronx

in New York City. Well, historically, the Bronx Zoo played a very important role in saving

bison. Patrick Thomas, vice president of the Wildlife Conservation Society, an associate director of its

Bronx Zoo. In the early 1900s, when bison numbers were at their lowest and the species

was facing extinction, the Bronx Zoo acquired as many bison as they could, bred them, and then sent

offspring from that breeding herd out west to reestablish herds in the wild. Thomas is involved in

efforts with the zoo's current herd of bison. Right now we're working to establish a herd of genetically pure bison at the zoo.

Today there are about 500,000 bison in the U.S., but there's only about between 5 and 6,000 that are genetically pure bison.

The rest have some small trace amounts of domestic cow genes in them. So we're establishing a herd of pure bison. The rest have some small trace amounts of domestic cow genes in them.

So we're establishing a herd of pure bison, breeding them, and again, our goal is to take offspring

from those pure bison and establish pure bison herds out west.

In what would be a continuation of one of the earliest success stories in American conservation.

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