From dragons to the Loch Ness Monster, mythical beasts have infiltrated many cultures. Is global warming creating conditions to help sea creatures breed?

In 2012, a Russian boy shot this video on his cell phone. He follows huge footprints into a grove of trees and spots a strange creature.

In Bosnia and Herzegovina, reports say the sun appears to defy the laws of nature. Some believe it's a religious miracle or that it has a supernatural element.

A former reform school has a haunting past that may explain strange sightings of so-called Shadow People. An amateur video purports to capture these beings on camera.

Zombies are popular in American movies and TV but in Haiti, stories of zombies have deep roots. Did this woman come back from the dead?

Hundreds of organ recipients have reported unique experiences after their transplant.

Mysterious objects near a 747 catch the attention of an experienced pilot over Alaska. Is the government covering up the truth about the unidentified flying objects?

In Alabama’s Big Bateau Bay, a mysterious plane crash baffles investigators. What brought down this veteran pilot’s plane?

Scotland’s Overtoun Bridge has a dark history of dogs leaping to their death into a gorge, perhaps as many as 50 dogs over the past half-century. What is drawing these dogs over the edge?

A discovery of bones belonging to seemingly giant people raise questions. Research looks to the real giants that live among us.

On March 24, 1967, men see an unidentified object hovering over Montana’s Malmstrom Air Force Base, home to nuclear weapons, which are all disabled simultaneously.

A 10-mile-long, 2-mile-wide lake in Siberia is one of the most remote bodies of water on Earth. Locals have claimed a sea creature lives in the icy waters.

A 2005 discovery could change everything we know about archaeology: five ancient pyramids in a Bosnian valley. Excavating the site could provide clues to whether they are natural or manmade.

Southeast of Mexico City, hundreds goats are found dead and completely drained of blood. Is this the work of the legendary chupacabra?

In 1980, a British police officer claimed he saw a UFO. Was the sighting linked to a dead body found “as if dropped from the sky”? Was there a cover-up?

The Flannan Isles is a desolate place, home to one of Scotland’s greatest mysteries: three lighthouse keepers who vanished without a trace. Was it a rogue wave or something more sinister?

A fireball in the sky over Sri Lanka in 2012 is followed days later by a mysterious downpour of red rain. During the search for a rational explanation, investigators find evidence of strange living cells with no earthly comparison.

Southeast of Mexico City, hundreds goats are found dead and completely drained of blood. Is this the work of the legendary chupacabra?

Bizarre, hairless, blue-eyed and hunch-backed creatures have invaded Texas, attacking and mutilating livestock. Now there is evidence they are breeding and their population is set to explode. Scientists are mystified, the authorities are in denia ...

On March 24, 1967, men see an unidentified object hovering over Montana’s Malmstrom Air Force Base, home to nuclear weapons, which are all disabled simultaneously.

Why would sailors mysteriously vanish from a boat, leaving behind all of their equipment with no signs of struggle?

Pilot Fred Valentich's last words were "it’s above me and it’s not an aircraft." Then a mysterious metallic sounded through the radio just before the pilot and his plane vanished without a trace. Is this evidence of UFO contact?

Area 51 in Nevada is America's most secret air base. State-of-the-art aircraft have been developed here for decades, but does it also hold clues to UFOs?

A strange dog-like predator has been spotted in Texas and believed to be responsible for slaughtering livestock and draining the corpses of blood. Could it be related to the chupucabra?

Hear from Director Sean Smith and go behind the filming of Fred Valentich's story - the pilot who mysteriously vanished along with his plane over Australia in 1978.

Mysterious phenomena and bizarre sightings seems to follow one distinct geographic line across America: a paranormal highway.

Residents of a small Italian village report everyday objects suddenly bursting into flames for no apparent reason. Are the mysterious fires connected to something alien?

Cusco was the capital of the ancient Inca civilization and home to some of the Incas' most sacred sites. Is this skeleton from a human sacrifice or something extraterrestrial?

The Flannan Isles is a desolate place, home to one of Scotland’s greatest mysteries: three lighthouse keepers who vanished without a trace. Was it a rogue wave or something more sinister?

Northern Europe's Baltic Sea is one of the most dangerous seas on Earth and hides a thousand wrecks on its bottom. One massive finding under its surface isn't like the others, however.

In 1996, a startling find in Russia raised many questions. Is this a tiny, deformed baby or a creature from out of this world?

In 1980, a British police officer claimed he saw a UFO. Was the sighting linked to a dead body found “as if dropped from the sky”? Was there a cover-up?