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

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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 American's 60-second Science. I'm Suzanne Bard.

More than 1,500 feet below the surface of the ocean, it's darker than a moonless night.

But even in this murky world, there's constant activity, including groups of Humboldt squid,

each the size of a small adult human, darting around in search of fish.

You can think of them as little rocket ships.

They jet through the water.

They engage in these feeding frenzies.

They're always looking out for an opportunity to eat.

Stanford University biologist Ben Burford.

He says feeding in a group requires careful navigation. These animals are cannibalistic.

They're pretty aggressive. So there's probably some risk to group living. We think a lot of

the communication they do in these groups helps with that. Like imagine driving in heavy traffic

with a bunch of aggressive drivers, say down in Los Angeles.

Thank goodness you have turn signals and brake lights and horns on your cars because that prevents a lot of catastrophe from happening.

Erford thinks Humboldt Squid communicate in the dark ocean by using their own form of signaling.

They do it by turning their bodies into animated message boards. How? Like other

cephalopods, they can rapidly change the pigmentation patterns on their skin by contracting

...