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.

In the summer of 2015, a strange delivery arrived in Munich, Germany.

25 boxes of still-frozen snow sent all the way from Antarctica.

The reason for shipping 1,100 pounds of snow from the bottom of the world,

scientists were hunting for

interstellar dust, which might hold clues about our place in the universe.

So, first thing scientists did was melt the snow and then filter it for fine particles.

Analyzing the remaining dust with mass spectrometry, they found traces of the isotope

iron 60, which is primarily produced in two ways,

by exploding supernovas or by cosmic rays zapping interplanetary dust.

But it's also produced in nuclear reactions here on Earth, by bombs or nuclear reactors.

So to determine how much of the stuff was truly interstellar from beyond our solar system,

the researchers used other isotopic

clues to screen out quantities of iron 60 produced by nuclear reactions in cosmic rays.

And they still had some iron 60 left over to account for, this stuff produced by supernovas.

Just by looking at something which is on our own planet, learn something which is so far away

and happened so many millions of years ago, I mean, that's pretty amazing, and that's why I really

...