Ukraine said it obtained secret data on a new Russian nuclear missile submarine. The classified data includes information about the submarine's survivability systems. The Project 955A-class vessel ...

Business Insider traveled with the Dutch Navy in the Arctic region to witness NATO operations. A reporter flew on the European-made NH90 helicopter, which specializes in anti-submarine warfare. This ...

The sinking of the K-278 led to concerns over environmental contamination, as the submarine went down with its nuclear reactor—and two nuclear-armed torpedoes on board.

Researchers believe the earliest forms of life on Earth began in hydrothermal vents—cracks in the sea floor that release hot, mineral-rich water. A team of scientists just discovered a hydrothermal ...