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.j.p.

That's y-A-K-U-L-T dot-C-O-J-P.

When it comes to a guide for your gut, count on Yacolt.

This is Scientific Americans' 60-second science.

I'm Lee Billings.

Got a minute?

Long before the space age, humans looking at Mars thought they saw evidence for the presence of water in the form of giant canals built by some very advanced, very thirsty civilization. Those 19th century

notions proved to be the products of poor telescopes and wishful thinking.

The canals were an optical illusion.

But 20th and 21st century observers have definitely found water on Mars.

Telescopes spied water and ice caps at the red planet's poles,

as well as signs of an ancient ocean covering the northern hemisphere.

The Viking landers saw water frost on

rocks. The Phoenix lander found water ice buried centimeters beneath the soil, and the Curiosity rover

has rolled through an ancient riverbed. Most mysteriously, orbiters overhead have glimpsed the

outlines of what seemed to be belts of buried glaciers girdling the globe at high latitudes. Some researchers

thought the dust-covered glaciers might be mostly made of mud or of carbon dioxide ice,

but a new study from researchers at the University of Copenhagen reinforces the consensus view

that the glaciers are made of water ice, and a lot of it. The findings are in the journal Geophysical Research Letters.

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