Oil-and-gas wells produce nearly a trillion gallons of toxic waste a year. An investigation shows how it could be making workers sick and contaminating communities across America.

How the Ebola outbreak spread.

On the shared life of Tatiana and Krista Hogan:

The girls’ doctors believe it is entirely possible that the sensory input that one girl receives could somehow cross that bridge into the brain of the other. One girl drinks, another girl feels it.

A new genetic engineering technology could help eliminate malaria and stave off extinctions — if humanity decides to unleash it.

Does hurting make us human?

“I wanted to be prepared for the worst nature could throw at me. But the real threat turned out to be human.”

On the centuries-long search for the perfect hangover remedy.

The schism at the heart of cosmology.

What the sensation of uncontrollable itch and the phantom limbs of amputees can tell us about how the brain works.

After Fukushima, balancing the risk of another disaster against the rising danger of climate change.

History’s largest mining operation is about to begin. It’s underwater—and the consequences are unimaginable.

Scientists in Brazil are trying to save the giant anteater from a growing threat: roads.

As psychiatrists and philosophers begin to define a pervasive mental health crisis triggered by climate change, they ask who is really sick: the individual or society?

The Arctic permafrost is thawing, revealing millions of buried mammoth skeletons. But the rush for mammoth ivory could put elephants in danger all over again

Independent “researchers” are sharing unfounded theories across social media, which have the potential to spread panic and confusion—and have even fooled legitimate government agencies.

The U.S. buried nuclear waste in the Pacific after WWII. It’s close to resurfacing.

Indigenous people and illegal miners are engaged in a fight that may help decide the future of the planet.

People said that women had no place in the Grand Canyon and would likely die trying to run the Colorado River. In 1938, two female scientists set out to prove them wrong.

“The vegan wars are not really about veganism at all, but about how individual freedom is coming into conflict with a personal and environmental health crisis.”

Last October, Super Typhoon Yutu wreaked havoc on Saipan. Today, residents still struggle—and no one feels it more than the kids.

Inside a Danish homicide investigation.

When a brain injury leads to a personality change and then prison time, a neuroscientist wonders if his brother could have been saved.

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

Fentanyl is quickly becoming America’s deadliest drug. But law enforcement couldn’t trace it to its source—until one teenager overdosed in North Dakota.

Why everything is getting louder.