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

This is Scientific Americans' 60-second science. I'm Lee Billings.

Mars is a planet of outsized splendor. Despite being only half as big and a tenth as heavy as Earth,

it bears the solar system's tallest mountain, longest canyon, and largest crater.

At 22 and 12 kilometers wide, however, its inner moon Phobos and outer moon Demos are figurative

small potatoes. Scientists suspect both formed much as Earth's single large moon did from a massive

debris disk ejected into orbit by a giant impact eons ago. But if Mars's moons formed like

Earth's, why are they so very much smaller?

The answer may be that they did not form alone.

New simulations from Pascal Rosenblad of the Royal Observatory of Belgium and colleagues show how the debris disk from a giant impact on Mars could have generated additional moons

a few hundreds of kilometers in size.

After forming in the dense inner regions of the disk,

those larger moons would have stirred the disk's sparser outer reaches, allowing smaller companions

like Phobos and Demos to coalesce from the ripples. The study appears in nature geos

in this scenario. The reason we only see Phobos and Demos today is that the bigger moons

were destroyed a few million years after their formation.

Their low, fast orbits outpaced Mars' rotation, creating a tidal pull that sent them spiraling

down to crash into the planet.

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