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It holds about 20 percent of the world's unfrozen surface fresh water. The figure is taken from UNESCO, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

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Yes. It sits on the Records & Extremes shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

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Lake Baikal is the deepest and oldest lake on Earth

It holds about 20 percent of the world's unfrozen surface fresh water

Plunging to a depth of about 1,642 metres in southern Siberia, Lake Baikal is the deepest freshwater lake in the world. Formed around 25 million years ago, it is also considered the oldest lake. It contains more water than all five North American Great Lakes combined.

Lake Baikal at Night (153110) — Astronaut photograph ISS070-E-80639 was acquired on January 24, 2024, with a Nikon D5 digital camera using a focal lengt · Public domain · source

Where this comes from

UNESCO

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Tags: lake baikal, siberia, freshwater

Lake Baikal is the deepest and oldest lake on Earth: the short answers

Where does this come from, and can I check it?: It holds about 20 percent of the world's unfrozen surface fresh water. The figure is taken from UNESCO, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a records & extremes fact?: Yes. It sits on the Records & Extremes shelf, one of 1,090 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.