Examining whether shadow people, spirits, poltergeists and other strange beings that have appeared in ancient texts and folklore could be otherworldly visitors that originate from unseen realms and coexist within humans' reality.

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Investigators discover compelling evidence of concealed pyramids in Alaska, China and Bosnia; the Great Pyramid of Giza in Egypt continues to unveil secrets with the discovery of a hidden chamber, raising new questions about its purpose and design.

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Across the globe, monumental stone figures silently bear witness to a forgotten era; on Easter Island, there are hundreds of Moai figures carved from volcanic rock, each weighing up to 90 tons, with the tallest standing over 30 feet.

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Prominent world leaders including the British Royal Family, Japan's Defense Minister, the Chinese government and Russia's former president have allegedly investigated Unidentified Aerial Phenomena (UAPs) for years.

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A look at details of heavenly flying chariots, abductions from Earth, and otherworldly visitors in books stricken from the Hebrew Bible; accounts of advanced technology, flying machines, and powerful weaponry in the sacred Vedic texts of India.

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A look at the potential for extraterrestrial connections to Earth's mountain ranges, which are often considered mystical places; a look at Mount Kailash in the Himalayas, Mount Musine in Italy and Mount Shasta in Northern California.

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The largely unexplored continent of Antarctica has long been subject to rumors of UFOs, underground tunnel networks and concealed ancient structures, giving rise to speculation about an alien presence beneath its icy surface.

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Archaeologists have uncovered temple complexes dating far back into human prehistory. They've identified ancient constructions submerged deep in our oceans, and even discovered that many of today's sacred sites were constructed atop older ruins.

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From rumors of covert extraterrestrial dealings with world leaders to the extraordinary claims of alien abductees and harrowing tales of pilot encounters with UFOs, a growing body of evidence suggests otherworldly beings have been making contact. What if this isn't a new occurrence? Ancient Astronaut theorists suggest that these extraterrestrial close encounters have been taking place for hundreds, if not thousands, of years.

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Meteor impacts, cosmic microbes, and space viruses have significantly impacted life as we know it. Recent discoveries suggest that some of the debris falling to Earth could have originated from other star systems and may even be of artificial origin. If so, might this point to ongoing extraterrestrial involvement with our planet, as Ancient Astronaut theorists suggest?

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Government whistleblowers have been instrumental in bringing attention to the often-dismissed topic of unidentified aerial phenomena. From Bob Lazar's controversial claims about reverse-engineering a UFO craft at Area 51, to shocking UAP video evidence released by former pentagon employee Luis Elizondo, and even to the recent congressional testimony on classified government UFO programs and alleged possession of extraterrestrial entities, for decades informants have risked their reputations and even their safety to publicly reveal their knowledge of an extraterrestrial cover-up. Might these disclosures - and others - finally force the government to make public their top-secret information on alien activity here on Earth?

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Military and commercial pilots have been stepping forward in recent years with astounding photos and videos evidence of Unidentified Aerial Phenomena. Intriguingly, these contemporary sightings share an eerie resemblance to unexplainable objects chronicled in historical records.

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