A cartoon house with wastewater going from the sink into the sewer

Secrets in Sewers

Challie Facemire

Most of us don’t think of the sewers as an exciting place. But these and other waterways are where Rolf Halden is finding and solving many mysteries.

Read more about Shorter Winters and Wolf Leftovers

In Yellowstone National Park, winters are getting shorter and there is less food for scavengers. That’s bad news for scavengers like bears, but could wolves help?

A picture of a wolf looking toward the camera, image by USFWS

Chelsea Brzezinksi

An image of ovaries in a person with PCOS. The image features an external look at a bumpy ovary attached to the rest of the female reproductive system, as well as a close-up, detailed look at the cysts within the ovary.

The Mysterious Case of the Missing Periods

Emily Santora

Estrogen and testosterone are two hormones that cause puberty. But what happens when the body doesn’t produce the amounts of hormones that it usually does?

A woman clutching her abdomen, experiencing period cramps.

Periods: What Should You Expect?

Emily Santora

Sometimes things don’t work as you expect them to, including periods. Learn more about what causes some girls to have irregular or painful periods.

Read more about Seedy Secrets in Primate Poop

How do seeds travel if they do not have legs to carry them? We can find one answer in primate poop.

Kathryn Michelle Benavidez Westrich

Read more about Rethinking Sharks

In Peru, how humans feel and what they know and do about sharks can have big consequences. How do human beliefs impact shark conservation?

The front of a great white shark, swimming through the water

Chelsea Brzezinski

An intersex pride flag, showing a purple circle on a yellow background

Intersex: More than Male and Female

Risa Schnebly Riley McInnis

You might think that people can be born only as either males or females. In fact, lots of people are born with a blend of male and female traits. We call this being “intersex,” and it happens more often than you may think.

Xs and Ys: How Our Sex Is Decided

Risa Aria Schnebly

Our biological sex determines a lot about the way our bodies look and function. But what determines our biological sex?

Focusing on Female Infertility

Emily Santora

What happens when a person wants to have a baby, but after years of trying, it just doesn’t happen? A lot of people want to become pregnant, but let’s learn about what may prevent pregnancy.

Shedding Light on Endometriosis

Emily Santora

A lot of illnesses, like colds, have very visible symptoms, but other conditions are not so obvious. Learn about how people spot and treat a condition called endometriosis.

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