The U.S. may end up with the worst COVID-19 outbreak in the industrialized world. This is how it’s going to play out.

Snow science against the avalanche.

The polar icecaps are melting. Is it OK to have a child? Australia is on fire. Is it OK to have a child? My house is flooded, my crops have failed, my community is fleeing. Is it OK to have a child? It is, in a sense, an impossible question.

Anatomy of an outbreak.

How Big Oil and Big Soda kept a global environmental calamity a secret for decades.

Despite decades of research, myth and fear still surround the animals.

The fossil-fuel companies expect to profit from climate change. I went to a private planning meeting and took notes.

Decades ago, two parents sued a drug company over their newborn’s deformity—and changed courtroom science forever.

How climate change is altering food in Greenland.

As medical researchers scramble to find the source of a fatal lung disease and officials seek to ban the sale of vape pens, our correspondent set out to separate reality from hysteria.

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.

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.