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

This is Scientific American's 60-second science. I'm Christopher in Taliatta.

A dying battery is a huge annoyance for cell phone users, but for engineers, it's inspiration.

Can we design a smartphone which can make a phone call and you can have a conversation without the need for any kind of a battery?

Sham Golikoda is a computer scientist at the University of Washington,

and he and his team have indeed designed a battery-free phone.

It looks like a circuit board with touch-responsive numeric buttons,

and it runs on just a few micro-wats of power,

which it harvests from light and from the radio signals,

emanating from a nearby wireless base station.

The team achieved the battery-free energy-efficient design by ditching two of the power-hungry features

of modern cell phones. One, the test unit skips digital-to-analog conversion, and two, it does

not generate its own wireless signals to make calls.

Instead, in receiving mode, it absorbs incoming radio waves from the base station and converts them directly into vibrations of its speaker.

In sending mode, it uses the vibrations of its onboard microphone

to change the way radio waves are reflected back to the base station.

And it worked to make a Skype call.

Hello. Hello. From a battery brief, I'll be. The findings appear in the proceedings of the

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