In the newest show from the Freakonomics Radio Network, host Zachary Crockett explores the hidden side of the things around us. This week: One creature’s trash is another’s cash. (Or, how one man found profit in pee.)

A sneak peek at Bapu's new book, Random Acts of Medicine, available now from Doubleday, and an announcement about the show.

Couples get divorced for all kinds of reasons. Is having kids one of them? Bapu talks about research that investigates what happens to parents who unexpectedly have twins. Plus, an announcement about the future of the show.

Doctors and nurses get most of the attention — but a new study suggests we can improve health care by raising wages for a group of workers who are often overlooked.

In hospitals, a softer pillow or a nicer room might be more than just amenities — they could improve outcomes for patients.

Americans eat a lot of sugar — and it’s hard to determine how it affects our health. Bapu explains how a new study uses data from the 1950s to help solve the mystery.

It’s not a new question, but it’s a tricky one to study. Bapu explains why, and talks about how an N.F.L. labor dispute helped him get some answers.

The most expensive drugs in the world are treatments for genetic diseases. And more of these cures are on the horizon. How will anyone be able to afford them?