Demonic seduction… hybrid offspring… and strange abductions. In cultures throughout the world, there are tales of intimate encounters with otherworldly beings. But could these stories be more than just mythology? Scientific deconstruction of human genetic makeup has revealed that our origins are not what we once believed.

Biologists have determined that early humans mated with several other species of intelligent hominids. Neanderthals, Denisovans, and a third—as of yet unidentified—species may also be represented in our DNA. Is it possible that tales spanning from fallen angels to Greek gods, medieval incubus and succubus to today's extraterrestrial sexual encounters are all one in the same? And if so, is it all part of a greater agenda? Might examining these experiences provide not only evidence of extraterrestrial sexual intervention in the remote past, but also reveal the true nature of mankind's origins?

From ancient accounts of fiery chariots in the sky in the Bible and flying carpets in Ethiopian texts to fire-breathing dragons in Chinese mythology, a look is taken into the possibility of the phenomena being extraterrestrial. Theorists explain how alien technology may be responsible for massive structures like the 3, megalithic stones in the French village of Carna, precision-cut blocks at Puma Punku in Peru and the Gobekli Tepe's 12,year-old circular structures.

A potential link between alien technology and mysterious devices from ancient cultures is examined. The Reptilian alien is a fixture of science-fiction, from H. But could ancient myths about reptilian creatures provide evidence that they are more than just a pop-culture creation? Legends of serpent beings can be found on every continent.

The Bible, the Quran and the ancient texts known as the Nag Hammadi codices all describe reptilian entities interacting with humans.

In Central and South America people worship the feathered serpent god called Kulkukan or Quetzalcoatl. In India, the Nagas are half-human half-reptile gods who live underground in a place called Patala. And in China and Japan, many emperors claim to be the descendants of dragons.

Could these stories represent real Reptilian beings that people all over the world actually encountered in the ancient past? He is one of the most prolific inventors of the 20th century--and the man that actually electrified the world.

Nikola Tesla shepherded mankind to a new industrial era and laid the groundwork for today's technological age--but could that have been by some otherworldly design? A man shrouded in mystery and intrigue, Tesla would speak about obtaining insights in a flash of genius, how he could visualize his inventions in full-detail and manipulate them in his mind, and his compulsion to invent the future.

But he also claimed to have direct communication from intelligent beings on other planets. Is it possible that this alleged mad scientist, so far ahead of his time, was actually a human "receiver"? A being tapped to advance mankind--and pave the way for a future reunion with our alien ancestors? It has been called the key to the universe and possibly the most important scientific breakthrough of all time.

Could the so-called "God Particle" reveal the truth about our origins? And might clues to its significance have been left here on Earth thousands of years ago by extraterrestrial beings?

The age-old question, "where did we come from? The discovery seemingly pitted science against religion. But could science and religion actually be kindred spirits?

Many ancient religions and mythologies describe the origins of the universe in ways very similar to today's scientific explanations and proclaim that this information was given to them by otherworldy beings. Stories of strange encounters accompany many of history's major events. Is it merely coincidence? Or might it be evidence of extraterrestrial intervention?

In ancient myths from cultures around the globe, gods are often portrayed intervening in human affairs. The Sumerian gods are said to have created mankind; the Hebrews believe God gave Moses man's first laws, the Ten Commandments, and the angel Gabriel reportedly shared divine wisdom with the prophet Muhammad. But is it possible that these supernatural visitations were not actually the work of the gods--but rather a race of extraterrestrials using advanced technology to create and shape our civilization?

Ancient Astronaut Theorists believe aliens may have helped guide mankind in the remote past--and that evidence for this stunning conclusion can be found sprinkled throughout human history. From the beginning of recorded history, humans have told stories about beings with super-human strength, super-sonic speed, and supernatural abilities. The ancients had heroic tales about Zeus, Thor, and Hanuman while today we have superhero stories about Superman, Batman, and Spider-man.

Mythologists say these epic stories resemble each other because they may have all come from a common set of oral legends created eons ago by our earliest ancestors. But might there be another, more otherworldly reason that the world's heroic myths are so similar? Is it possible, as many Ancient Astronaut Theorists contend, that these stories are actually based on extraordinary-- and possibly extraterrestrial--beings that lived on Earth in the distant past?

Could the darkest recesses of our planet contain important information left by our ancient ancestors? Throughout human history, some caves have been considered sacred places for spiritual encounter and enlightenment, while others have been feared as true portals to purgatory. What happens in these subterranean spaces that has the power to influence religions around the globe?

In Charma, India, archeologists recently discovered 10, year-old prehistoric artwork of what appears to be extraterrestrial beings. Could these paintings be a visual record of alien encounters in the distant past? Or might there be knowledge actually stored within the crystals and minerals that cover the walls of caves, as some Ancient Astronaut theorists suggest? The Great Sphinx in Giza is the largest and most studied monolithic sculpture on Earth, yet it remains one of humanities greatest mysteries.

This ancient monolith defies explanation, pre-dates our earliest known civilizations and may hide the secrets of our very origins. While mainstream archeology theorizes that the Sphinx was built around BC, geological evidence suggests it is much older. If this is true, then who--or what--created the Sphinx?

Researchers are now proposing the existence of a second, twin Sphinx on the Giza Plateau. If so, has it been There are those who believe that the evolution of technology is not entirely of our own making. Ancient Astronaut theorists contend that it is by extraterrestrial design that we have become so technologically interconnected--and that we are being watched by beings from beyond our world.

Do stories from the ancient past hold evidence of alien overseers? The Book of Enoch describes divine entities called the Watchers descending to Earth to monitor humankind and aid in our advancement.

Inca legend states that the god Viracocha created humans and taught them astronomy,. Throughout history, many of the world's greatest thinkers have helped push civilization forward with their profound insights and extraordinary abilities.

But the majority of these master minds say their brilliance comes from a place they don't understand-and arrives at times they're not expecting it.

In antiquity, people in nearly every culture around the world believed they did not possess genius, but that genius possessed them, like a spirit. Could it be that the forces of inspiration that the ancients attributed to the gods really did emanate from an otherworldly For thousands of years, in cultures throughout the world, people have practiced elaborate techniques to preserve the human body after death.

The ancient Egyptians believed mummification ensured entrance into the next life. Ancient Astronaut theorists believe the global practice of mummification is not a coincidence, but proof that highly advanced extraterrestrials visited Earth in the distant past.

Could our ancestors have witnessed a form of biological hibernation and then mimicked it with mummification? Could mummification have been an attempt to recreate suspended animation so often connected to extraterrestrial space travel? Or could the intention have been to preserve the body for future DNA removal?

Throughout history, incredible stories have been told of the dead rising from their graves, mummies journeying into the afterlife, and people on the brink of death mingling with deceased relatives in a celestial netherworld. Are they simply legends--or could some of these stories actually be true?

From Jesus and Elijah to mummies and zombies, our culture is filled with accounts of beings who are able to lift the veil between life and death. And even today, scientists are trying to mimic this by suspending death in the operating room for hours at a time. Haitian priests continue the ancient practice of raising "zombies" from the grave. And microscopic organisms have been found that can resuscitate themselves after lying dormant for weeks.

Are we on the verge of decoding the mysteries of life, death, and resurrection? There are those who believe that embedded in our most sacred religious texts, as well as in the design and location of ancient monuments, are secret messages—messages that may reveal the purpose behind our very existence. Could it be true? Strange and cryptic communications with unknown meaning have been discovered all across the globe throughout every known civilization.

Might the key to unlocking the mysteries of the universe be found hidden in numerological, geometrical, and geological puzzles left for us to solve by extraterrestrial beings that came to Earth thousands of years ago?

Are humans being tested? Have we learned enough to crack the codes necessary to decipher these messages? And if so, might our understanding of them allow us to finally be reunited with our celestial ancestors?

It is a story told in more than twelve hundred cultures around the world—the gods sent a great flood to wipe out humanity for its disobedient and wicked ways. Do these numerous creation myths point to an actual deluge, one that engulfed the world and spared only a chosen few? New evidence suggests that many fabled aspects of these flood myths may, in fact, be true. Did humanity narrowly escape extinction? And are the ancient stories correct—that alien beings are the reason we survived?

Ancient Astronaut Theorists believe they are—and that celestial beings are poised to save us again when another catastrophe sweeps across the Earth. The Civil War nearly destroyed the great experiment known as the United States of America, but is it possible that the preservation of the republic was influenced by extraterrestrial beings?

Abraham Lincoln described strange visions and premonitions that occur before pivotal moments in his presidency. Union officer Ambrose Bierce wrote about mysterious disappearances and inter-dimensional travel. And a ghostly image of George Washington was witnessed by hundreds of soldiers at Gettysburg—prompting an official government investigation. Is it possible that extraterrestrials were present during the Civil War? If so, were they simply passive observers, waiting to see if our fragile democracy could survive this test?

Or did they take an active roll in order to preserve the Union? With infrared satellite technology detecting pyramids hidden underneath the sand in Egypt and airborne laser sensors discovering long lost pyramids beneath the jungles of Central America, many believe we have entered a new pyramid era--an age of discovery that will be marked by unimaginable new findings.

Archaeologists now believe the ancient pyramids in Peru are older than the Egyptian pyramids, and a recently surveyed megalithic site in Indonesia is now suspected to be a step pyramid built by a long lost civilization 20, years ago. But what can explain ancient man's apparent obsession with building pyramids?

Ancient Astronaut theorists believe the world pyramid phenomena is not a coincidence, but evidence that Earth's earliest inhabitants may have had help from extraterrestrials. Stories of civilizations large and small disappearing without a trace can be found throughout history and across the globe. From a previously unknown civilization in China, a vanished race of giants, to the unexplained disappearances of the Classic Maya and the Anasazi--elements of these disappearances cannot be completely explained by conventional scholars.

Although these cultures have vanished from the face of the Earth, they have left behind intriguing clues--clues, some say point to an otherworldly explanation. And if entire groups have been taken off planet, might there be a connection with sites connected to mysterious vanishings of people, planes, and boats in various locations throughout the world? Could examining these disappearances lead us to not only uncover evidence of extraterrestrial intervention in our remote past, but also reveal the consequences for the future of the human race?

Many of humanity's most significant turning points have bore witness to unexplainable events. Is this merely coincidence, or could it be evidence that the course of human history is being manipulated by an alien agenda? Ancient Astronaut theorists have long proposed that extraterrestrials played a pivotal role in our past, and some believe they continue to keep a careful watch over the progress of mankind.

Even high-level government officials have made claims that extraterrestrials are visiting our planet with an interest in our technological advancements, including former Canadian Defense Minister Paul Hellyer, who stated that that the cosmos are teaming with life. Could the UFO phenomenon be real? Have extraterrestrials been monitoring human progress for thousands of years--at times helping us to advance, and at other times holding us back? Enormous manmade caves Unexplainable structures And underwater discoveries that challenge everything we know about the past Is it possible that an advanced civilization inhabited Earth thousands of years ago?

And if so, were they human, or something out of this world? Modern archaeologists are continuously unearthing artifacts and sites that defy the conventional timeline of human history.

Throughout the world we find megalithic stone monuments that are attributed to mysterious ancestors, strange humanoid figures that date to pre-historic times, and evidence of ancient underground shelters hewn out of solid rock. Could it be that a sophisticated culture existed on here Earth--thousands and even tens of thousands of years earlier than we believe?

Could the stories of a time when gods and otherworldly beings inhabited the planet be more than just mythology? When German aerospace engineer Wernher von Braun joined the U. Von Braun's bold predictions that we would explore Mars and build a space station have become reality. But how is it that von Braun--whose contemporaries included such scientific geniuses as Nikola Tesla, Robert Oppenheimer, and Albert Einstein--was so far ahead of everyone when it came to rocketry? Or is it possible that the greatest rocket scientist the world has ever known found his inspiration not on our world, but another?

Incredible strength Superior intelligence And even the ability to reproduce. In the 21st century, robots are being programmed to do everything from performing surgery on humans--to exploring other planets.

And humanoid robots are rapidly reaching a level of sophistication that was thought to exist only in science fiction. But what are the implications of creating robots that are increasingly intelligent and independent?

Is the obsession with creating counterfeit humans really pointing the way to mankind's future Greek stories dating to B. In Egypt, the Pyramid Texts say that the god Osiris was dismembered, then reassembled and brought back to life just like a machine. If sophisticated robots really did exist in the ancient world--what function did they serve? Who built them? And what happened to them? Good and Evil. Light and Dark. God and Satan.

In nearly every culture there are stories of opposing forces at work here on Earth--forces of a supernatural or otherworldly nature. Could these forces really exist? And if so, what is the true nature of the dark forces? Throughout history, there have been individuals accused of being in league with agents of darkness. The infamous mad monk Rasputin believed he served as a conduit for an otherworldly realm, the Nazi SS were said to have tapped into dark powers through ancient symbols, and famed occultist Aleister Crowley claimed to have summoned a non-human entity through the use of dark magic.

Is it possible the entities these men claimed to be in touch with were, in fact, extraterrestrials? And might humans serve as the pawns in a cosmic battle between the forces of light and dark? Ancient Astronaut theorists have suggested that many of the divine beings depicted in cultures throughout the world are not really divine--or mythological--but instead reflect extraterrestrial visitations that our ancestors did not understand. If true, what can account for all the different types of beings that are depicted, from anthropomorphic birds and reptiles, to gods with blue skin to multi-limbed humanoids?

Might there have been numerous alien species inhabiting Earth? Could the accounts given by modern day alien abductees be evidence that these otherworldly entities continue to visit Earth to this day?

And is it possible that they all have a common ancestor? Some believe that these remains are of extraterrestrial origin.

Billions of dollars have been spent in our quest to find an "other Earth. Is it possible that this discovery finally answers the age-old question: "Are we alone in the universe? Throughout world mythologies, there are tales of beings from the stars coming down to Earth.

The Dogon tribe in Africa believes their gods came from the Sirius star system. The Maya associated their gods with the Pleiades star cluster.

And according to the Hopi tradition, life itself was seeded by celestial beings. Ancient Astronaut theorists propose that not only has our planet been visited by extraterrestrials, but that they are responsible for our very existence.

In August of , Russian cosmonauts aboard the International Space Station discovered something incredibly unexpected covering parts of the windows--living sea plankton. If sea life can thrive in space, might the reverse be true as well? Might there be alien life forms that inhabit our seas? Throughout history, there have been tales of strange creatures hiding in Earth's waters.

While many discount stories of sea monsters as purely mythological, it is estimated that Earth's oceans are home to between , to one million species--and shockingly, two-thirds of those species still remain unknown. Considering the recent discovery that some sea life can survive in outer space, is it possible that tales of giant creatures like the Kraken and The Loch Ness Monster are evidence of extraterrestrial entities taking refuge beneath the seas? Over 10, crop circles have been reported worldwide, appearing in 50 different countries, and nearly every continent on Earth.

These strange designs pressed into crop fields range from simple circles to elaborate pictograms thousand of feet long. The phenomenon has been associated with scientific anomalies, strange lights, and even UFO activity. But critics say that they are all part of an elaborate hoax. But are they? Crop circles have been making modern headlines since the 's, but their history can be traced back hundreds--if not thousands of years. The designs themselves often contain encrypted messages and complex mathematical, geometric, and astronomical equations that perplex our top mathematicians and scientists.

Ancient Astronaut Theorist, Giorgio Tsoukalos travels to England to meet with researchers and scientists to investigate the phenomenon both on the ground and in the lab to find out what we haven't been told. On March 19th, , Gary McKinnon was arrested for hacking into 97 Pentagon and NASA computers over a month period, in what authorities call the "biggest military computer hack of all time.

Might the United States military really have a secret space program? And if so, are we preparing for a space-based war with other nations Ancient Astronaut theorists suggest that there are numerous factions of alien races with competing agendas visiting Earth, and that there is evidence they have been in conflict with each other for thousands of years. According to these theorists, there is evidence that these wars actually took place here on Earth in the distant past--not between gods, but between extraterrestrial visitors.

Due to warfare, instability, and inaccessibility--there are specific regions of the world that are off-limits to exploration. These forbidden sites are often ground zero for chaos and the destruction.

Antarctica is Earth's most remote and least explored continent. It is buried under as much as three miles of ice in some places, but recent satellite imagery has revealed what appear to be the tops of man-made pyramids scattered throughout the ice-covered landscape.

Farfetched, perhaps. But to proponents of ancient astronaut theory, these pre-colonial close encounters are considered commonplace events. For them, it offers additional proof that we are not alone. They have several sightings of what we would call UFOs today along the discovery of America, during the conquest of America. When you have a meteor like that or a bolide, the characteristics are very different than the ones of genuine UFOs.

The other possibility is that it was a meteor traveling very close to the horizon and that the movement of the ship is actually what made the light appear to be moving up and down. What if Columbus, Magellan, and the early explorers really did see evidence of extraterrestrial creatures visiting our planet? What does this say about our past? Our history? And our future?

Could they have been witnessing a close encounter? They see this incredible sight as the sun is coming up. They see what they describe as cigar-shaped objects, circles in the air, and crosses; flying crosses. The spheres and discs were seen for a long time, as they apparently were fighting in some kind of a battle over the city. In fact, the battle was so evident that the people in Nuremberg were actually able to perceive which side was winning.

Some of the objects were seen to crash into the ground and disappear in a cloud of smoke or steam. The Zurich Central Library to this day retains a copy not only of the famous woodcut that shows the sighting over Nuremberg, but also a woodcut showing a sighting from that year that was quite similar in Basel, Switzerland.

In the old times, everything paranormal, extra, extraordinary belongs the realm of divinity, of Gods. God is punishing us! God is blessing us! Go repent! Go to church! Could the people of Nuremberg have actually witnessed a battle between warring alien factions; an event eerily similar to the one written about in the Bhagavad Gita over 3, years earlier?

And if not, what else would explain the vivid accounts of luminous globes and blood-red crosses appearing in the sky? Throughout the Middle Ages, visions of strange happenings were often attributed to God or the supernatural.

But moving into what is known as the early modern period of the 17th century, people began to look more and more toward science and the stars for answers. And with the invention of the refracting telescope in , there would be more eyes trained on the stars than ever before. Cotton Mather said that he was looking through a telescope at the Moon, and in the telescope, he saw a flying light over the surface of the moon.

Well, how did this get recorded? By none other than NASA. There are a vast number of natural atmospheric phenomena that can appear as bright lights in the night sky. Even certain kinds of terrestrial phenomena do materialize as glowing balls of light that, seen from a distance, may appear to be a star. Though it is uncertain what Cotton Mather saw, ancient astronaut theorists find it significant that a prominent religious figure would report such a sighting not as a vision from God, but as an astronomical event.

And in this context, people were thinking about science, they were thinking about machines, and really thinking about, could there be something in space? By the end of the 18th century, the majority of people, at least of educated people, were convinced that all throughout the solar system on Jupiter, on Mars, on Saturn. I once did a tally of the leading intellectuals in the of them included ideas of extraterrestrial life in their publications.

The premier 18th- century astronomer William Herschel also supported the theory that life existed on other planets. Though there was an open debate about the existence of extraterrestrial life in the often extend to the idea of aliens visiting Earth.

But in , a series of sightings occurred across Europe that were so compelling; the possibility could no longer be ignored.

In over Kilkenny, Ireland, there was a sighting of a luminous object coming out of a red cloud. That same sighting is reported in the span of a week over the rest of Europe, particularly over Romania in Eastern Europe. Could these nearly identical reports of a strange object passing through the sky be mere coincidence? In colonial America, the idea that aliens were visiting Earth was gaining ground. The United States officially declared its independence from Great Britain in , and just 14 years later, a report of the first UFO sighting in American history appeared in the newly published journals of John Winthrop, the second governor of the Massachusetts Bay Colony.

As they watched, the light flared up and then contracted into what they described as the figure of a swine. And when it finally disappeared, the three passengers in the boat, who had been drifting downstream the entire time, were astonished to find themselves back at the point where they began their trip.

Certainly, it seems hard to fathom that, for two or three hours, three men in a boat watched a bright light moving around in the sky over the city of Boston. As abduction cases evolved, you heard people say all of a sudden everything around them was slowing way, way down. Those who believe the account!

The bottom line on it is, he says, you must believe in extraterrestrials if you know any modern astronomy. The idea of God made the entire universe going from planet to planet redeeming people is just impossible to believe.

In December of , Thomas Paine was arrested in France as a result of supporting a political party that was no longer in power. When the American ambassador refused to speak on his behalf, Paine believed that George Washington had abandoned him because of his writings supporting the idea of extraterrestrial life and refuting traditional Christianity.

Jefferson, an intellectual, was considered a genius by many in his time, both for his skill as a statesman and his scientific aptitude. And some believe he was also a proponent, like his contemporaries Ben Franklin and John Adams, in the concept of the plurality of worlds.

The new rationality in science changed the way that these Founding Fathers talked about religion. If you hire a European professor, they are liable to believe in Christianity, and that is a very dangerous doctrine that we should stay far away from. Other Founding Fathers also agreed with this view, which included a belief in the existence of life on other planets. Benjamin Franklin wondered if there were different gods for every sun that harbored intelligent life.

Many of them felt it was clear that there were intelligent beings conceivably through the whole universe, and that the notion that God came to this planet as a person who was spit on and persecuted, simply was ridiculous.

In northwestern New Mexico lies a vast concentration of ancient ruins known today as Chaco Canyon. Built from sandstone blocks and timber between and A. Until the 19th century, they were the largest buildings in North America. Chaco Canyon was a center of activity for a lot of different Indian tribes, Pueblo tribes.

When archeologists first excavated these ruins in , they marveled at their architectural precision. But even more astonishing was the fact that many of these ancient structures— like those found in Egypt, England, and South America— suggested the inhabitants had a sophisticated knowledge of astronomy. And at Fajada Butte, which sits at the entrance of the canyon, three giant slabs of rock are positioned near two spiral petroglyphs etched on a cliff wall.

During the solstice and the equinox, these rocks catch the sun in such a way as to shine daggers of light on different areas of the petroglyphs. But why would early Native Americans spend so much time building the structures at Chaco Canyon along such precise astronomical alignments?

And why build them in such a desolate area of the country? It is one of those sites which has been posing so many questions, and which science is only slowly beginning to explain. In his book The Orion Zone, archaeo-astronomer Gary David proposed that the geographical layout of Hopi ruins in the American Southwest precisely mirrors the star patterns of a number of constellations.

When you look at where the ancestral Pueblan major ceremonial sites are actually located, Gary David has identified that when you just map these, you actually find that they depict constellations, specifically, Orion is very important. But why Orion? And could it be merely a coincidence that this constellation pattern has been found at other important sites around the world , and always with the belt pointing towards a place of significance?

Ancient astronaut theorists have discovered the constellation of Orion lining up with the Mayan complexes along The Street of the Dead in Mexico City. They also find it at the Giza Pyramids in Egypt, with the belt pointing toward the city of Heliopolis; a place of worship for ancient Egyptians. And so, they believed— as astrologists believe today— that the stars have certain powers over what goes on on planet Earth. According to their legends, the Hopi believe there were three worlds that preceded the one we are in today.

Each of those worlds was wiped out when guardians of the sky called to the Creator to tell him that his finest creation, humans, were no longer living according to his plan.

Could the guardians of the sky have led them here so they could monitor the position of the sun? There was no reason to live there. If the daggers did not pierce the petroglyphs at the same points as the previous year, they would know that the Earth was out of balance. And since the Earth fell out of balance at the end of the previous three worlds, this could mean the end was coming once again.

Do you think the Indians were watching that? Is it possible that these stories, along with the ancient texts of India and the stories of the Bible, are all describing alien visitations? For ancient astronaut theorists, the answer is yes, and the proof may lie on a small, uninhabited island in Nova Scotia, Canada. In , three Nova Scotia farm boys set out to explore nearby Oak Island after witnessing strange green lights coming from its shore in the middle of the night.

They came across different platforms made out of wood, especially out of oak, and the deeper they dug, they also came across a mat made of coconut fiber, and they came across a stone slab that had very bizarre writing on it. One thing is crystal clear: Canada does not have any coconut trees, so the mat made of coconut fiber— where did it come from? But since that time, over a dozen professional excavations have been attempted and funded by everyone from actors John Wayne and Errol Flynn to Franklin D.

Mining and excavation companies have dug multiple shafts surrounding the whole Money Pit with the hopes of achieving or reaching whatever is buried down there. Based on the findings from numerous excavations, the Money Pit contains a series of oak platforms starting at a depth of ten feet and recurring every ten feet thereafter, going at least feet down.

Images Donate icon An illustration of a heart shape Donate Ellipses icon An illustration of text ellipses. Ancient Aliens Seasons for now Movies Preview. It appears your browser does not have it turned on. Please see your browser settings for this feature. EMBED for wordpress. What if life on Earth began in outer space? Millions of people accept the theory that intelligent life forms visited Earth thousands of years ago and were worshiped as gods by primitive man. Are monuments like Stonehenge and Easter Island the last remains of an ancient alien visitation?