Military submarines are out there, lurking under the water, ready for action, but how long can they stay down there? It's ...

Submarines' top speeds are different when they're underwater than when they're cruising on the surface -- and not always in ...

The USS Becuna submarine sank 3,888 tons of shipping and earned four battle stars in World War II.

Decommissioned submarine snorkel dives are a unique underwater adventure that lets you dive into history, exploring sunken ...

Have you ever wondered whether it's possible to own a personal submarine? It turns out that it is, but it will cost you millions and you may not be impressed.

China is reportedly developing a new, secret submarine that has raised concerns among defense experts worldwide. Built at the ...

The Kavachi volcano is an active underwater volcano located near the Solomon Islands in the southwestern Pacific. Underwater, ...