A team of divers explored the century-old wreck of the WW1-era submarine HMS M1, 20 miles off Plymouth, Devon, UK. The sub, famous for its 12-inch onboard gun, sank in 1925 after colliding with a ...

Submarines have been used in warfare for centuries. Undersea warfare has come a long way since the first experimental contraptions took to the seas. The modern nuclear-powered submarine represents a ...