For decades, scientists have had better maps of the Moon and Mars than of Earth’s own ocean floor. But thanks to NASA’s ...

Add articles to your saved list and come back to them any time. A casual sailor enjoying a day on Fremantle Harbour could easily mistake the half-submerged nuclear submarine for a navigation ...

By Choe Sang-Hun Reporting from Seoul North Korea said on Saturday that it was building its first nuclear-powered submarine to enhance its nuclear weapons abilities, and the state news media ...

SEOUL, South Korea (AP) — North Korea unveiled for the first time a nuclear-powered submarine under construction, a weapons system that can pose a major security threat to South Korea and the U ...