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.

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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 Yacolt.

This is Scientific Americans' 60-second science. I'm Karen Hopkins. This will just take a minute.

When I was in college, I worried about exams and how I was getting home from the pub.

When Isaac Newton was an undergrad, he came up with a theory of how water moves through plants,

200 years before botanists figured it out for themselves. That's according to an article in the journal Nature

by David Beirling of the University of Sheffield's Department of Animal and Plant Sciences.

Beirling writes that between 1661 and 1665, Newton, while at Cambridge University, kept a notebook

in which he jotted down musings on various matters.

Buried between sections on philosophy and attraction electrical infiltration is a half-page on the

subject of vegetables. There, the young polymath tackled the topic of plant sap, and how it might

rise from the roots to the leaves. Newton suggested that what he called a globule of light shining on a leaf could knock away a particle of water,

causing the juices of the plant to riseeth upward.

He's loosely describing what we now refer to as the process of transpiration,

in which the energy of sunlight causes water to evaporate from a plant's surface,

thereby drawing water up through the stem.

Where Sir Isaac came up with this idea, we'll never know.

But it suggests that before he saw that the apple must come down,

he was doing some serious thinking about, within the tree, what goes up.

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