What on Earth?Season 102021 · 10 episodesEpisodes1Australia's Nuclear DesertSatellite images capture a giant symbol mysteriously carved into the expanse of Australia's Great Victoria Desert; an investigation reveals a secret nuclear weapons-testing cover-up by the British government with numerous aboriginal casualties.2Viking Warrior InvasionSatellites capture bizarre circular structures in the forests of England.3Mystery of Apache MountainSatellites capture mysterious stone objects across the Arizona mountains.4Hidden Fortress of SecretsSatellites capture a castle-like structure hidden in Scottish woodlands.5Code of the Viking WitchSatellites capture rocks in the shape of a fingerprint on a Swedish island.6Mystery of the Cursed ForestSatellites capture a bizarre pattern of circles in a remote English forest.7Secrets of the Roman OccultAerial imaging captures a complex of ancient Roman buildings in Yorkshire.8Legend of Moonshine ForestSatellites capture a gigantic oval carved into the forests of New Jersey.9Nuclear Ghost TownsSatellites capture a mysterious collection of ghost towns in Belarus.10Lair of the Living GodSatellites capture a cone-like structure in the mountains of Turkey.Season 1Season 2Season 3Season 4Season 5Season 6Season 7Season 8Season 9Season 11Season 12