Deepest lakes in the world: A new exploration takes us from the Siberian wilderness to the heart of Africa, where we learn about the amazing depths and secrets of the world's deepest bodies of water.

Baikal's high biodiversity includes over 3,600 plant and animal species, most of which are endemic to the lake. Holding one-fifth of the world's unfrozen fresh water, Baikal in Russia's Siberia is a ...