What on Earth? - Season 4, Episode 09: Finding King Arthur
In season 4 we are going through a new series of exciting discoveries during the fourth season, which seems to be full of events and surprises. The fourth season begins with these powerful events, showing a ghost town covered with strange white powder from a lake in Argentina. When a missing jungle is discovered in Africa, scientists embark on a dangerous mission to explore it; a secret CIA image reveals the existence of a gigantic Soviet superpower.