Deep beneath a Mexican mine lies the Cave of Crystals, a breathtaking cavern filled with colossal selenite formations.

For 150 million people across the United States, humidity surged to levels higher than Miami late Monday. Maps show where.

Deep in the sweltering jungles of central Laos, Long Tieng played a central role in the United States’ fight to stop the spread of communism in Southeast Asia. Fifty years after its fall, we ...

Thick clay deposits on Mars hint at long-lived lakes that may have sheltered early life - and preserved clues beneath layers ...

It’s beautiful, mysterious—and the center of some of the strangest stories on the planet. From UFO sightings and vanished hikers to legends of underground alien civilizations, Mount Shasta’s ...

Dive into the world's wildest extremes, where heat scorches and ice bites! 🌍 From blistering deserts to frozen tundras, ...

Hot air holds more moisture than cold air. That simple truth, while familiar to anyone who’s used a blow dryer or walked ...

Our severely stormy pattern will not take a break for the holiday weekend. Storms will continue to threaten southeast ...

An intense and nearly historic weather pattern is cooking much of America in a dangerous heat dome this week with ...

Seasons are caused by the fact that the Earth is tilted on its axis by 23.5 degrees. This time of the year, we are awaiting the summer solstice, which is on Friday this year.