Ancient Aliens

Studies have shown that up to 70% of all UFO sightings happen in so-called 'hotspots' where reports of visions, mysterious lights and unusual phenomena are regularly witnessed--and not only in modern times, but dating back thousands of years.

More than 10,000 crop circle formations have been documented in over 50 countries, and many display properties that defy conventional explanations. Are they of otherworldly origin? And if so, what is their purpose?

The discovery of the ancient megalithic site of Karahan Tepe in southern Turkey turns the world of archaeology on its head, displaying engineering skills far beyond what the people of the time were thought to be capable of.

The obelisks of ancient Egypt was perfectly carved from a single granite rock. While scholars identify them as monuments, Ancient Astronaut Theorists suggest they powered a technology that allowed communication with the gods came from the stars.

MUFON is the world's leading organization devoted to the scientific investigation of unidentified aerial phenomena and other unexplained encounters. Could MUFON's extensive database contain definitive proof of extraterrestrial visitation?

Meteor impacts have created the perfect environment for humankind. Could new evidence reveal that celestial objects have been sent by an alien intelligence?

Close Encounters of the Fifth Kind: Explore whether contact with extraterrestrial life could have occurred. If so, has this happened in the highest levels of the US government?

The Mysteries of Alaska: The vast Alaskan wilderness is known for disappearances, stories of strange creatures and UFO sightings. Could this be due to an otherworldly presence?

Pilots report terrifying UFO encounters, including aircraft control takeover & entire jumbo jets vanishing. Such unexplainable events have occurred since the dawn of aviation, leading to speculations about extraterrestrial presence in the airspace.

Could the megalithic structures of Malta - and an underground complex housing otherworldly remains - be linked to local legends of alien visitation.

Count down the world's top ten pyramid sites, from hidden structures in Peru to the famous landmarks of Giza in Egypt.

Count down the top 10 mysterious devices found around the world, from strange discs found in a cave in China to an ancient Greek computer.

Count down the world's top 10 mysterious islands, including sites said to be home to giants and islands that disappear into thin air.

Count down the top ten alien craft, from V-shaped objects to orbs of light to flying saucers.

Count down the top 10 alien petroglyphs around the world, from strange figures to flying craft and carvings of what appear to be astronauts.

In the 1900s, a modern-day prophet Edgar Cayce became a worldwide sensation. He claimed to receive visions of both the past and future

Count down the top ten mysteries of the deep, from sunken continents to supposed proof of the lost city of Atlantis.

Explore whether the Gods of Greece including Zeus, Apollo and Poseidon, were actually extra-terrestrial visitors to Earth.

In the 21st century, UFOs have gone from fringe science to mainstream obsession. UFO hunters are using incredible technology, and UFOs are being openly investigated. Are we closer than ever to understanding the strange events happening in our skies?

Examining 75 million years of the most credible alien evidence here on Earth, from the age of the dinosaurs to ancient Egypt to the skies over the western desert in the present day.