Researchers have discovered an underwater sinkhole so deep, they haven’t even reached the bottom yet. Taam Ja' Blue Hole ...

The biblical tale of Noah's Ark and the flood must be among the most well-known stories throughout human history. Mount Ararat has long been associated with the Ark, and the recent discovery of a ...

Divers in Mexico's Yucatan Peninsula say they have discovered the world's largest underwater cave. Underwater archaeologists discovered last week that the cave system known as Sac Actun, located near ...

At over 4 billion years old, the Earth has seen civilizations come and go. While many of these civilizations have been studied, others have been swallowed up by the planet and nearly forgotten about.

A National Geographic Explorer's search for Cleopatra's tomb got a big breakthrough. Kathleen Martínez has spent the last 20 years searching for the lost tomb of Cleopatra. Her work is part of a new ...