Scientists believe that nearly half a billion years ago, the majestic Mount Everest was under water. It's hard to believe, but here are details.

Archaeologists are exploring the dark blue waters of Denmark's Bay of Aarhus, searching for ancient coastal settlements swallowed by rising sea levels more than 8,500 years ago. This summer, divers ...

Sea level on Earth has been rising and falling ever since there was water on the planet. Scientists were already able to use sediments and fossils to roughly reconstruct how sea levels changed over ...