Nuclear submarines carry out multiple types of missions, but no matter the mission, it's vital that they remain hidden in the ocean's depths.

USS H-3 being moved off Samoa Beach to Humboldt Bay on April 6, 1917, during salvage operations by the Mercer-Fraser Company. Public domain.

Add Yahoo as a preferred source to see more of our stories on Google. Hard work built his career. John Mellencamp does not want his children to feel pressure to clock in. "I'm the only father in the ...

Curling, which first became an organized sport in Scotland, traces its roots to the 1500s. Historians say paintings from the time depict people sliding rocks across frozen ponds. It took a few ...