When satellites captured images of circles on Lake Baikal, the world's oldest and deepest lake, scientists were surprised. What phenomena could have created such precise geometric patterns? 🇬🇧 Catch full episodes of your favourite Quest shows on discovery+: https://bit.ly/3oAzuyz Subscribe ...

The search continues with new episodes of In Search Of Fridays at 10/9c! Some Ancient Astronaut Theorists believe alien life could be found deep within the earth's most mysterious caves in this clip from Season 9, "Forbidden Caves". #AncientAliens Subscribe for more from Ancient Aliens and other ...

Under the waters of Lake Baikal in 1982, 7 Russian divers are exploring the world deepest freshwater lake on a research mission, but 50 metres underwater, ... source