Alexey Kolganov films himself skating on transparent ice of lake Baikal, as new cracks form under his skates. Most surprising is the unexpected, cosmic sound.

Baikal is located in a rift zone, a deep crack in the Earth's crust which narrows at depths of several dozen kilometers. A tranquil video of white and silver bubbles of methane caught in newly-formed ice was filmed at Maloye More, a strait that separates the lake's largest island from the western shore of Lake Baikal.