Men have become increasingly infertile, so much so that within a generation they may lose the ability to reproduce entirely.

Birds like Roseate Spoonbills and Burrowing Owls are ending up in the stomachs of hungry pythons and nile monitors. Is it too late to stop them?

Daniel Kish is entirely sightless. So how can he ride a bike on busy streets? Go hiking for days alone? By using a technique borrowed from bats.

How Viagra went from a medical mistake to a $3 billion industry.

On medical acting and real pain.

The author grew up drinking and bathing in the toxic waters around a military base in North Carolina. Thirty years later, she returns to investigate.

What can hyperpolyglots teach the rest of us?

A mysterious wild cat in Sri Lanka may hold a clue.

The symptoms are here: multiyear droughts, large-scale crop failures, a major city—Cape Town—on the verge of going dry, increasing outbreaks of violence, fears of full-scale water wars. The big question: How do we keep the water flowing?

Can hospitals learn to better treat Deaf patients?

Hucksters claim that drinking a few drops of hydrogen peroxide diluted in a glass of water will cure almost anything.

An adventure on an Alaskan glacier with a new best friend.

At 18, Katie Stubblefield lost her face. At 21, she became the youngest person in the U.S. to undergo the still experimental procedure to get a new one.

World-famous Houston surgeon Bud Frazier spent decades developing a revolutionary device that could save millions of lives.

On the ubiquity of forest fires.

Almond growing in California is a $7.6 billion industry that wouldn’t be possible without the 30 billion bees (and hundreds of human beekeepers) who keep the trees pollinated — and whose very existence is in peril.

The debate over what really killed the dinosaurs is still raging.

At a South Korean laboratory, a once-disgraced doctor is replicating hundreds of deceased pets for the rich and famous.

Drought, dread, and family in the American Southwest.

The Berkeley Pit is a gorgeous, toxic former mining site in Montana that’s beloved by tourists. But unless it’s cleaned up soon, it could become the worst environmental disaster in American history.

We knew everything we needed to know, and nothing stood in our way. Nothing, that is, except ourselves.

We know more about sleep than we ever have and we’ve never been worse at it.

Thirty-four years after the Bhopal gas leak, the abandoned waste pits are spreading poison and still destroying lives.

A pre-eminent expert on large carnivores runs afoul of the enemies of the wolf.

Could a global icon of extinction still be alive?