‘It’s cool to be cold’: Confessions of frigid-weather fanatics

These chionophiles are happiest in subzero temperatures, but they worry that embracing the cold is a challenge fewer will have the opportunity to accept.

See the Mississippi River's hidden history, uncovered by lasers

Using hyperprecise LiDAR data, a cartographer maps the river’s bends and channels over time with mesmerizing results.

Deadly virus spreads among marine mammals as Arctic ice melts

As climate change worsens, scientists fear the virus—once found only in European waters—could spread to the U.S. West Coast.

What did travel have to do with the fall of the Berlin Wall?

Find out here—and discover what the fascinating German capital offers to today’s travelers.

‘I am scared all the time’: Chimps and people are clashing in rural Uganda

Forest clearing has forced hungry chimps to raid villagers’ crops. At times, chimps kill children, and villagers kill chimps.

See Mercury glide across the sun in rare sky show

On November 11, the innermost planet will sail across the solar disk in an event that won't repeat for another 13 years.

How two centuries of slave revolts shaped American history

The daring and desperate acts of rebellion from New York to the Caribbean shattered contemporary stereotypes of enslaved peoples and challenged the institution of slavery itself.

Beat the crowds at these abandoned U.S. national parks

These 7 spots might have lost their national status—but you can still explore their rich history and natural beauty.

Rare cancers spreading among sea creatures have scientists perplexed

Some malignancies can jump between different marine species, the latest in series of discoveries that’s changed our understanding of cancer.

Why the Berlin Wall rose—and how it fell

The ugly symbol of the Cold War was built to keep East Germans from escaping to the West. A decades-long fight to flee brought it down.