According to Guinness World Records, the smallest submarine ever made is just 4mm, or 0.157 inches long, and was created in 1999 by the German company MicroTEC as a mini medical device.

North Korea unveiled for the first time a nuclear-powered submarine under construction, a weapons system that can pose a major security threat to South Korea and the US. State media on Saturday ...

and one of the first people to ride in a submarine? It sounds crazy, but James I (or James VI in Scotland) may well have been one of the world's first submariners. His putative nautical adventures ...

The incredible story of John Philip Holland, who was born in County Clare on this day in 1841 and went on to invent the first submarine. John Philip Holland was born just off the Atlantic coast ...