Part two of a two-part documentary about Lake Baikal, the oldest (25 million years) and deepest (1,700 m) lake in the world. The film aims to raise awareness of the fragility of its ecosystem.

The Baikal seal—or nerpa—remains one of the most recognizable symbols of the lake. It is the only exclusively freshwater seal ...

The lake is approximately 25 million years old and this and its size has given space and time for a great many endemic species to evolve. The most famous of these is the Baikal seal but there are ...