Aired: Feb 10, 2015A colossal tsunami hangs suspended, its fury held in check, while a mysteriou...


A NASA astronaut's discovery of a ring-shaped formation in Lake Baikal's ice from the International Space Station sparks the uncovering of more enigmatic features on the world's oldest and most captivating lake.
Streaming in:
Canada
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Currently, you have the opportunity to watch "What on Earth?" by streaming it on the following platforms: Discovery+.
Seasons: 12
Network: Science
Production Country: United States
Genres:Documentary