In 1986 it got up close to the Titanic, and now deep-sea explorer Alvin is achieving more world firsts, this time documenting 1.2 miles of new reef featuring live coral that's thousands of years old.

A deep-sea expedition to one of Earth's most remote island chains has surfaced stunning pictures of the vibrant ecosystems ...

The octopus could be seen floating into view of the team’s ROV Atalanta’s camera as it hovered about 5,518 feet (1,682 meters) deep below sea level in an unnamed seamount in the PMNM area.