Lake Baikal Holds 20% Freshwater

The immense volume of water in Siberia's Lake Baikal is a direct result of its dramatic geological origins. Unlike most of the world's large lakes, which were carved by glaciers and are only a few thousand years old, Baikal lies in an active continental rift valley. Here, the Earth's crust is slowly pulling apart, a process that began an astonishing 25 million years ago. This ancient, ongoing split has created a basin of incredible depth—over a mile at its deepest point. It is this combination of extreme depth, age, and vast surface area that allows the lake to hold a staggering one-fifth of all the planet's unfrozen surface freshwater.

This long history of isolation has turned Lake Baikal into a unique evolutionary laboratory, earning it the nickname "the Galápagos of Russia." The lake's cold, oxygen-rich waters support over 3,600 species of plants and animals, the majority of which are endemic, meaning they are found nowhere else on Earth. Its most famous resident is the nerpa, the world's only exclusively freshwater seal, whose ancestors are believed to have traveled up rivers from the Arctic Ocean long ago. This unique ecosystem also includes the translucent, oil-rich golomyanka fish and countless species of tiny crustaceans that act as a natural filter, giving Baikal its legendary water clarity.