Science Channel's most watched series reveals Earth as it's never been seen before. Illuminating views captured by more than 4,000 orbiting satellites, `What on Earth?' investigates mysteries from strange geological occurrences to weird man-made structures. Every day, the eyes in the sky uncover new mysterious phenomena, and some defy easy explanation. To search for answers, the series combines modern imaging technology with analysis from military and intelligence professionals as well as leading scientists.
When mysterious structures are discovered deep in a remote forest, experts investigate if this strange site was the long-lost birthplace of a top-secret Nazi project. (S7, ep 1)
When instruments on the International Space Station malfunction, experts investigate if this behaviour is more than a tech glitch, but a prophecy of doomsday. (S7, ep 2)
Circles of reindeer appear in the remote tundra of Sweden. Experts investigate if this strange event could be evidence of fatal aftershocks from the Chernobyl nuclear disaster. (S7, ep 3)
When an island off the coast of Mexico suddenly disappears, government officials scramble to find an explanation. (S7, ep 4)
When the people of a thriving Midwestern town suddenly disappear, they leave behind an eerie ghost town with a dark secret. (S7, ep 5)
When satellites spot anomalies in the unexplored Amazonian jungle, experts wonder if they've discovered relics of a lost civilisation. (S7, ep 6)
Aerial images reveal a strange dark stain covering a coastal town. (S7, ep 7)
Experts uncover a labyrinth that could lead them to the secrets of Imhotep. (S7, ep 8)
Strange satellite images taken above the Nile Valley could point investigators to long-lost relics buried in an unexplored city of the dead. (S7, ep 9)
New satellite evidence reveals a mysterious spiral structure from space and experts speculate that it could be the lost city of Atlantis. (S7, ep 10)
When an extreme drought hits Spain, the ruins of a long-lost civilization suddenly emerge and using cutting-edge technology, experts investigate evidence of ancient cannibalism. (S7, ep 11)
Bizarre markings are observed from space across the planet. Strange sightings point to conspiracies that could have global repercussions. Just what on Earth are they? (S7, ep 12)
Modern imaging technology and analysis by military and intelligence professionals, investigate mysteries from strange geological occurrences to weird man-made structures. (S7, ep 13)
Bizarre markings are observed from space in oceans and deserts across the planet. Strange sightings point to conspiracies that could have global repercussions. (S7, ep 14)
Eerie anomalies were detected by the International Space Station over a mysterious site in the Atlantic Ocean, which could be a harbinger of global catastrophe. (S7, ep 15)
Discover Mummies, Romans and the Biblical Plagues of Egypt and The Female Super Soldiers of Voodoo Lake. (S7, ep 16)
Hitler's 400-foot secret supergun, something big and weird in the Atlantic and inside the Frankenstein tomb of horrors. (S7, ep 17)
Booze, bombs and death-defying escapades in the New Jersey Pine Barrens murder dome and the hell cruise to King Solomon's island. (S7, ep 18)
The ghost towns of the twilight zone. America's secret starvation experiment. The atomic ice worm. Rome's mystery ancient megastructure and the Island that changed history. (S7, ep 19)
Discover the Lair of the living god and the Super Warrior of the ancient world, along with the riches and bloodshed in the California deserts. (S7, ep 20)