On their first dive of the day, the divers descended to approximately 130 feet and Heinerth noticed a warning sign which, in ...

Until now, only a handful of scientists have ventured into blue holes, but in the summer and fall of 2009, a multidisciplinary cave-diving and scientific ... dramatically, a sign that its owner ...

There is no sign these mysterious people remain in the modern gene pool. The stunning discoveries recently made in northern Mexico's Chiquihuite Cave raise more questions than they answer.

(This program is no longer available for streaming.) Follow a fearless team of scientists as they venture into blue holes—underwater caves that formed during the last ice age, when sea level ...

The cave swallow (Petrochelidon fulva) is a small, stocky songbird that builds its nest in the so-called twilight zone of caves—right at the entrance, where the light levels are low. The species ...

"He is brilliant with children, and he would have made sure that they were prepared in the best possible way from a cave-diving perspective," she said. "He would have been the perfect person to ...

And Heinerth says diving inside that iceberg in Antarctica was her most dangerous dive to date. "I was the first to cave dive inside an iceberg, so we had no idea what we might encounter.

Because it’s impossible to know what’s going on in another person’s head, anyone who sees one or more of the below warning signs—or simply suspects that their loved one may be thinking of ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient ...

Get ready for a fright! We've got the scariest horror movies of all time. Find classics like "The Exorcist" and "It," as well ...