Terrence Tysall set a record scuba diving to the Edmund Fitzgerald. Ric Mixter dove in a submersible, finding a missing body. Here are their stories.

On Nov. 10, 1975, TV anchor Dennis Anderson was preparing for the 10 p.m. news. John Crowley was at a Duluth bar with some Coast Guard shipmates. Their lives were about to change forever.

Why have just one technological breakthrough when you can have two at the same time? The Royal Navy has installed for the first time a quantum clock into its XV Excalibur robotic submarine for ...