The ringed seals is considered the ancestor of the Baikal seal, and are thought to have reached the lake by traveling up the river system and drainage that runs from the lake to the Arctic Ocean some 400,000 years ago during the Pleistocene.
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The ringed seals is considered the ancestor of the Baikal seal, and are thought to have reached the lake by traveling up the river system and drainage that runs from the lake to the Arctic Ocean some 400,000 years ago during the Pleistocene.
Lake Baikal is so deep because it is located in an active continental rift zone. The rift zone is widening at a rate of about 1 inch (2.5 centimeters) per year. As the rift grows wider, it also grows deeper through subsidence. So, Lake Baikal could grow wider and deeper in the future.
Russian explorers using two mini-submarines reached the bottom of Siberia's vast Lake Baikal - one of the last relatively unexplored frontiers on Earth. The team announced they had sunk to a record depth of 1,680 metres (5,512 ft).
Only 20 lakes, worldwide, are ancient: more than 1 million years old. Lake Baikal is not only Earth's oldest lake, at 25–30 million years of age, but also the largest, and the one with the most potential for revealing new discoveries at the frontiers of astroparticle physics.