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 Yacolt.

This is Scientific Americans' 60-second science. I'm Steve Murski.

My book is called Water in May.

It's about a 15-year-old Dominican American living in Washington Heights named Mari Pujols.

And she wants more than anything else to have a baby.

And so she's very excited when she finds out that she's going to have a baby, and then the doctors tell her her baby has only half a heart.

Ismay Williams. Dr. Williams is a pediatric cardiologist at Montefiore Hospital in the Bronx and the author of the young adult novel Water in May.

I met Williams May 19th at the first annual Bronx Book Festival at Fordham Plaza in New York

City's northernmost borough. As with so much so-called young adult fiction, the novel deals with

serious issues, including the medical problem surrounding such a heart defect. We do surgery

for this type of heart problem, which is called hypoplastic left heart syndrome.

40 years ago, 95% of infants with the condition died within a month. Now most of these kids

will make it to adulthood, but will also need frequent medical monitoring and care. Anyone

buying the book will support a worthwhile cause, too. 40,000 kids a year are born with heart defects.

I partnered with a group called Collins Kids, which raises money for families who are affected

by congenital heart disease and are in financial need.

And it also raises money for research.

So 5% of book sales go directly to them because part of my goal for writing the book is also

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