What on Earth? S07e03

When strange circles of reindeer appear in the remote tundra of Sweden, experts investigate if this mysterious event could be evidence of fatal aftershocks from the Chernobyl nuclear disaster.

Satellite images capture evidence of an abandoned town hidden.

Satellites capture an island that suddenly appears in the Pacific Ocean.

Remains of a Roman village are discovered high in the mountains of Peru.

Mysterious satellite images lead an archaeologist to investigate a cemetery on Devil's Island, the notorious penal colony in the tropics of South America; what he finds there reveals evidence of grisly executions that fueled a shark feeding frenzy.

Satellite images capture evidence of a mythical lost pyramid in China that’s been hidden for centuries, and experts suspect it could be just one of many unknown structures used as a secret military base designed for subterranean nuclear warfare.

Satellites capture a temple-like, Nazi structure hidden deep in the forests of Poland, leading an expert to investigate and uncover a tale of terrifying rituals, black magic and the rise of the most feared division of Hitler's war machine.

A satanic symbol that points to an army of the dead in Siberia; a massive stone giant in a remote desert; evidence of a Russian doomsday device right on America's doorstep; cutting-edge technology helps experts answer sinister mysteries from space.

Alien monoliths haunt the coast of England. An obliterated jungle points to an brutal narco gold rush. Evidence of a strange blood-red creature emerge from the deep. Cutting-edge technology helps experts answer these sinister mysteries from space.

Something strange in the Himalayas could be evidence of a top-secret CIA program to turn monks into killer agents, and cutting-edge science helps experts investigate the truth behind this mysterious anomaly.