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.C-O.J-P. When it comes to a guide for your gut, count on Yacolt.

This is Scientific American's 60-second science. I'm Christopher in Talata. Got a minute?

If you're lost, you need a map and compass.

The map pinpoints where you are, and the compass orientes you in the right direction.

Migratory birds, on the other hand, can traverse entire hemispheres

and end up just a couple miles from where they bred last year, using their senses alone.

Their compass is the sun, the stars, and the Earth's magnetic field, but their map is a little more

mysterious.

One theory goes that they use olfactory cues, how a place smells.

Another is that they rely on their sense of magnetism.

Researchers in Russia investigated the map issue in a

past study by capturing Eurasian reed warblers on the Baltic Sea as they flew northeast towards their

breeding grounds near St. Petersburg. Then they moved the birds 600 miles east near Moscow, and the birds,

they just reoriented themselves to the northwest,

correctly determining their new position.

Now the same scientists have repeated that experiment,

only this time they didn't move the birds at all.

They just put them in cages that simulated the magnetic field of Moscow,

...