These ghostly hoops have been spotted above volcanic events around the world. But how they form has long been a mystery.

These ancient trees persisted for nearly 200 million years until they all but vanished. Now they line city streets.

In the early fourth century A.D., Rome was notorious for persecuting Christians. Yet the night before battle, Constantine ...

As teens spend less time with their friends in person, scientists are beginning to uncover how isolation may affect the ...

Scientists are discovering that the oral microbiome—home to hundreds of species of bacteria and fungi—may help predict ...

Scientists have discovered that gut-born bacteria may hold the secret for treatments of everything from IBD to Parkinson’s ...

Nearly 60 square miles burned and 100,000 people were displaced. Now many are holding on to what they found—in their homes ...

Genetics, the microbiome, and low screening rates may be factors in the increase, experts say. Here are risk factors for the ...

Egyptian geese are aggressively territorial. During mating, they are monogamous, making it likely the pair fighting the ...

A “raging freak of nature” is how National Geographic described Hurricane Sandy when it hit land in fall 2012. From beginning to end, Hurricane Sandy's progression caused deadly flooding, mudslides, ...

Beneath the cliffs of western Colorado, a billion years of geologic history unfolds—and a century-old dream of accessibility still shapes the land.