Illnesses caused by heat—dehydration, cramps, and even strokes—can come on quickly and quietly. New, wearable technology could help alert wearers to lurking danger.

These glowing seas have baffled sailors for centuries. Science may finally have answers. "Milky seas” are one of the rarest reported forms of bioluminescence.

My husband and I were both like, ‘Oh, my God, what is a roadrunner doing here?’” Young, a biologist and nature writer, says. ...

From record stores to jazz cafes to karaoke, here are the best ways to keep up with everything this music-infused city has to ...

Here’s what to look for in the July night sky. The globular cluster Messier 22 (M22) reaches its highest point in the sky ...

These iconic ‘coffin roads’ offer an unmatched view of Scotland. In the Highlands and Islands, trace the steps of historic funeral processions through epic landscapes on some of Scotland’s ...

Africa’s Great Migration sees millions of wildebeest and zebra thunder across the sun-bleached savannah, drawn by instinct to cross crocodile-infested rivers where predators lie in wait. But beyond ...

The best wildflower hiking trails in the U.S. Spring is in bloom. Here are our favorite places to frolic through fields of flowers, from the Pacific Northwest to the Appalachian Mountains.

This May marks 1,700 years since the convening of what is arguably the most important and influential council in Christian history. For three months in 325 CE, Emperor Constantine gathered ...

The Swiss canton of Glarus has voted this way since medieval times—with the goal to find a solution that's “a little bit OK ...

Tristan Duke uses Arctic ice and a unique technique to offer a fresh perspective on a world transformed by climate change.

Dolphins have lived near Rome for at least 2,000 years. Scientists fear for their future. Rome's dolphins have an unusually high number of bite marks, suggesting that the population is in competition ...