Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014. An astronaut spots something strange in the Sahara Desert. A mysterious orange sludge invades a remote village in Alaska.

A buried monument offers new evidence about one of the Bible's greatest mysteries. A giant shadow engulfs the Pacific Ocean. Scientists can't explain a lake that's shaped like a perfect circle, and is home to otherworldly life.

A dagger sealed in King Tut's tomb 3,000 years ago is made of metal that seems to have extraterrestrial origins. A massive swastika is found in the desert near Roswell. Satellites hunt for the world's most wanted man, Joseph Kony.

A heavily armored force takes over one of Syria's most ancient archaeology sites, prompting fears that its relics are being stolen. Tanks appear to be facing off in Antarctica next to an unworldly object. A water reservoir in LA suddenly turns black.

A sinister giant swastika appears in a forest in Germany. A strange pattern is etched near the famous Nazca lines, but archaeologists don't know who put it there. Mysterious markings are spotted in an isolated corner of Antarctica.

Satellite images reveal how El Chapo escaped from a high-security prison in Mexico. Mysterious patterns in the two far-apart deserts spark a major scientific investigation. A giant black stain appears in a war-torn area of Iraq.

A giant "Z" is carved into a Mexican hillside, evoking the mark of a legendary outlaw. A strange sighting in Germany points to secrets from the Cold War. Massive red marks in China prompt fears of a violent government crackdown.

A strange mass breaches surface of an ocean near Antarctica, sparking rumors of a mythological sea monster. An area of the US-Mexico border becomes an international mystery. Ancient rock carvings depict weird, unearthly beings.

An amateur archaeologist stumbles open strange symbols scratched into the Kazakhstan desert. CIA photos show what looks like a giant Star of David on the island of Cuba. A lake in the Brazilian rainforest has turned bright pink.

A vast structure buried in the sands near the legendary city of Petra points to a bloody past. When terrorists kidnap more than 200 schoolgirls in northern Nigeria, rescuers use satellites to track them down.

New evidence could lead to the discovery of an unknown ancient civilization in the Amazon rainforest. An island disappears, and investigators are mystified. An unidentified submarine is spotted in a North Korean shipyard.

A massive chasm appears in a remote part of the Siberian forest, and locals call it to a gate to the underworld. Images of a nuclear missile silo in Montana are being manipulated. A bright green spiral appears in the Persian Gulf.

New evidence reveals a massive Arctic canyon buried beneath the ice. A mysterious island suddenly appears off the coast of the highly sensitive border between Iran and Pakistan. A plane is spotted on Google Earth at the bottom of a lake in Minnesota.

Strange images from the jungles of Colombia could lead researchers to the legendary city of El Dorado. An ancient symbol of satanic worship is spotted from space in Australia. An apocalyptic sandstorm swallows in the Middle East.

A young boy makes international headlines when he uses satellite images to discover lost cities of the Maya. Satellite images might point to a modern-day genocide. Trees in China seem to be spelling out a sinister message.

The myth of Merlin is associated with an arrangement of stones in France, and satellite images may finally explain the ancient riddle. Investigators find something strange buried in the Gulf of Mexico. An island suddenly appears.