And Now There is a Mini-Submarine Gap

YahooNews: A Russian mini-submarine on Tuesday reached the bottom of Lake Baikal in Siberia, setting a world record for the deepest dive in a lake, the crew told organisers from the vessel. "Mir-1 is at 1,680m" (5,512 ft), a crew member could be heard saying in a radio link-up with a special barge near Olkhon Island that had lowered the Mir-1 and Mir-2 submarines into the waters of the world's deepest lake.

Lake Baikal was previously believed to be a max of 1,637m deep and scientists say they could find new life-forms in its unexplored depths. This is a world record for a submarine diving in fresh water.