Lake Baikal: The world's deepest and oldest lake

Lake Baikal, in Siberia, is the deepest and oldest lake in the world.

It is about 5,300 feet deep at its deepest point. Scientists estimate that it is about 20 million years old.

Lake Baikal is also the largest body of fresh water in the world. It contains about 20% of the world’s unfrozen fresh water.

Lake Baikal’s ecosystem is extremely diverse, and nearly 80% of the plant and animal species that live in and around the lake cannot be found anywhere else.

One of its most famous animal species is the Baikal seal (also called the nerpa).

It is one of the world’s smallest seals, and it is the only species of seal in the world to live exclusively in a freshwater habitat.

How the seals’ ancestors arrived in Lake Baikal remains a mystery, since the lake is hundreds of miles from the ocean.

The indigenous human inhabitants of the Baikal region are an ethnic group called the Buryats. The Buryats adopted Buddhism in the 16th century.

But some also practice elements of their older Shamanistic faith. They consider the immense lake sacred, and believe that it is inhabited by the numerous spirits.