An autonomous submarine named Ran discovers strange structures under the Dotson Ice Shelf in Antarctica, before mysteriously disappearing.

North Korea state media photos showed a largely completed nuclear-powered submarine hull as leader Kim Jong Un condemned rival South Korea’s push to acquire the technology ...

North Korea touted its progress in building a nuclear-powered submarine, releasing photos through state media on Thursday ...

The official Korean Central News Agency said North Korean leader Kim Jong Un visited a shipyard to inspect the construction ...

North Korea released new images showing apparent progress on a nuclear-powered submarine as Kim Jong Un criticized South ...

The debut followed the North’s first test of a new surface-to-air missile and the arrival of a U.S. nuclear-powered attack ...

Hanwha's Philly Shipyard has the capability of building a nuclear-powered submarine for the U.S. Navy, said Alex Wong, global chief strategy officer at Hanwha Group, according to a statement from the ...

North Korea on Thursday released new images of what it claims is its first nuclear-powered submarine, a massive vessel equal in size to some of the United States Navy’s attack subs.