Garrett P. Serviss' Edison's Conquest of Mars, published in 1898, is perhaps the first story to feature ancient astronauts who have a major influence on early human civilizations, predating Fort's book by over 20 years. In it, the narrator learns that the Martians from The War of the Worlds visited Earth around 7500 BC, enslaving the inhabitants of the Fertile Crescent and bringing them to Egypt to make monuments of their conquest, including the Giza pyramid complex and the Great Sphinx (which is actually the face of the leader of the Martian expedition). Afterwards, a plague caused them to leave, with the Martians taking a number of their human slaves to Mars to serve them there, until an expedition led by Thomas Edison freed their descendants in the early 20th century.
Wilson Tucker's The Time Masters (1953) has a private detective who turns out to be Gilgamesh, who was a survivor of a starship crash thousands of years ago.
Kurt Vonnegut's The Sirens of Titan (1959) depicts the whole of human development and civilization to be a medium used by aliens for relaying messages to an alien space-explorer stranded on one of Saturn's moons.
The March 1961 issue of Analog Science Fiction and Science Fact contains a piece by Arthur W. Orton entitled The Four-Faced Visitors of Ezekiel. Although described in the magazine's Table of Contents as a short story, it actually takes the form of a pseudo-factual essay presenting a verse-by-verse analysis of Ezekiel's vision and interpreting this in terms of an encounter with ancient astronauts. In this respect the essay mirrors J. F. Blumrich's book The Spaceships of Ezekiel (1974), despite predating it by more than a decade.
Philip K. Dick explores this theory in his VALIS trilogy, wherein race of ancient astronauts is thought to have placed an information-streaming satellite in orbit around Earth.
James P. Hogan wrote of an alien race which inhabited a destroyed fifth planet between Mars and Jupiter and are discovered in the hulk of an abandoned spacecraft on Ganymede in his five-volume Giants series. (1977-2005.)
Buzz Aldrin's and John Barnes' novel, Encounter With Tiber (1996), deals with the discovery of ancient alien encounters on Earth and Mars, with humanity utilizing recovered alien technology to advance the space program.
In David Brin's Uplift Universe series, all known species were brought to sapience through the direct intervention of a known galactic "patron", except for the fabled first sentient species, the Progenitors, and humanity. While most humans take pride at achieving space travel without a patron, some humans (called Danikenites, after Erich von Däniken) and most Galactics believe otherwise.
S. M. Stirling's novels The Sky People and In the Courts of the Crimson Kings state that an ancient race of aliens populated Earth, Mars, and Venus with human and animal life. Additionally, the ancient astronaut theme is played in reverse, with the technologically advanced humans from Earth being seen as advanced gods by the bronze age-level alien natives of Venus and Mars.
In William H. Keith, Jr.'s "Heritage Trilogy," a war between the United States and a United Europe (and later between the United States and China) has its roots in the discovery that ancient astronaunts visited Earth on several occasions. Ancient technology found on Mars, the Moon, and Europa change the balance of power on Earth.
In Walter Ernsting's The Day the Gods Died, an extraterrestrial civilization is said to have built the ruins of ancient Peru.
In the Outlanders novel series by Mark Ellis, the Anunnaki are revealed to have been the culprits behind a devastating nuclear war as well as the Root Race of the so-called Gray aliens.
The Marvel comic series The Eternals deals with advanced aliens (the Celestials) who had experimented on early hominids, creating two sister races, the Eternals and the Deviants, who resembled "gods" and "demons" respectively. It is also noted that their advanced test eventually lead to the X-gene in mutants.
Yoshiki Takaya's manga series Bio Booster Armor Guyver, later adapted several times into animated form and twice into a pair of americanized films, featured the idea that all life on earth was created by an organization of various alien beings as biological weapons intended for use in interstellar war, which were later abandoned for reasons unknown, and thus were never taken into space. According to the series, human beings are actually a 'first stage' organism that can be further mutated into monstrous creatures called Zoanoids, which supposedly account for many modern-day myths of vampires and werewolves. The comic features an alien armor supposedly used by the aliens themselves which remains on Earth and is possessed by a high-school student. One of the principal characters, the most highly advanced living weapon, fears the aliens' return and plans to take mankind into space to find a means to confront the aliens on their own terms.
In Jon Stewart's Naked Pictures of Famous People the section "The Recipe" claims to be a translation of an ancient Aztec text from 2000 BC depicting a celebrity awards ceremony. In the context of the book, Erich Von Daniken brought it to the world's attention in his book Weird, Huh? wondering if ancient alien visitors had brought knowledge of celebrity awards shows to the Aztecs.
Doris Lessing's Canopus in Argos series describes the Earth from the view of two alien civilisations, responsible for bringing life to the planet.
A Japanese/American comic book series, Jason and the Argobots, portrayed the Egyptian Gods as extraterrestrials who became "teachers" to the people of ancient Egypt and who return to protect the Earth from a war between alien races.
David Wisniewski's book The Secret Knowledge of Grown-Ups" mentions in passing a hangar wherein employees of the United States Government "stack all the banged-up flying saucers", implying that the existence of such is well-known, but that the Government attempts to conceal it.
A series of short novels known as the Outernet series has, as one of its premises, the idea that Stonehenge was originally built as a means of communication with extraterrestrials.
An obscure novel by André Norton called Merlin's Mirror portrays the wizard Merlin as a servant of benevolent "Sky People" who seek to elevate humanity and thwart the "Dark Ones" who wish to keep humanity ignorant. Nimue is described as a servant of the Dark Ones, sent to prevent Merlin from giving humanity a leader (Arthur) who would bring it to the heights of knowledge. The Sky People are once implied to have assumed the guises of already-worshipped gods, such as Cernunnos, in order to communicate with humans, and sometimes are identified as divine by the human characters. Stonehenge is said to be their creation, and Merlin's reconstruction of it a means of establishing a "beacon" whereby the Sky People would find their way to Earth, avoiding their own extinction and humanity's limitation.
In Frederik Pohl's Gateway series of novels, the Heechee are described as an ancient alien race that visited our solar system thousands of years ago. They left behind a variety of futuristic technology, which creates many interesting opportunities for Earth.
The Japanese anime television series The Super Dimension Fortress Macross (1982) featured an ancient, long extinct and very advanced humanoid alien civilization called The Protoculture, who dominated the Milky Way Galaxy by founding a Stellar Republic and who also created the human race on Earth.
The film Outlander (2008) is based on an advanced man from space crashing on Earth during the Viking era and remaining with the Vikings as their king.
The BBC, Doctor Who serial Pyramids of Mars (1975) featured a conflict on Earth between aliens of a race named the Osirans forming the basis of Egyptian mythology, and a number of other Doctor Who serials have used similar ideas.
In The Thing (1982), an alien ship crashes in Antarctica in 100,000 B.C.E. A character later mentions Chariots of the Gods? and the belief that the Incan civilization was developed by aliens.
The original Battlestar Galactica and the 2003 remake depicts humans as having originated on the planet Kobol and later settled thirteen colony planets, Earth being the last and most distant. The plots of both concern a group of humans attempting to find Earth. The original 1978 series is more closely linked to the ancient astronaut theory, using modernized versions of ancient Greek, Egyptian, and Middle Ages costumes, as well as mixing ancient myths and religious materials into the storylines. In contrast, SyFy's 2003 remake deals little with ancient myths and legends and depicts an American-like culture, and in a twist, it is revealed that the "human" and Cylon protagonists are in fact the ancient astronauts themselves.
The French animated series Il était une fois... l'Espace (1982) (English: Once Upon a Time... Space) featured far-future humans taking on the role of superior aliens to an inca-like culture. The spaceships of the human civilization also used decorative iconography derived from the Nazca lines as a wink to the theory – the ship of the main characters using a hummingbird design.
The television series The X-Files (1993–2002) has borrowed the theory.
The movie Stargate (1994) featured Ra, a member of the alien species Goa'uld that came to Earth around 8000 B.C., who enslaved the ancient Egyptians, creating their culture and religion, before eventually transporting thousands of them through the Stargate to offworld mining colonies.
Spin-off television series Stargate SG-1 (1997–2007), Stargate Atlantis (2004–2009) and Stargate Universe (2009-2011) feature aliens called the Ancients (alternatively Alterans, Lanteans, or Anquietas) who are found to have traveled to Earth millions of years ago to start and influence human evolution. Also featured the sinister Goa'uld, who posed as gods to enslave the humans; and the benevolent Asgard, who posed as gods to protect the humans.
The Stargate: Ultimate Edition: Director's Cut DVD includes a featurette interview with Erich von Däniken entitled "Is there a Stargate?".
A 1996 episode of the animated series Gargoyles involves an ancient alien living in a hidden spaceship under Easter Island. In the episode it is concluded that this alien came to Earth long ago and inspired Moai statues which Easter Island is famous for.
The Star Trek franchise has dozens of examples of extraterrestrials visiting Earth in past centuries, many having an influence on pre-modern humans. These are just a few prime examples:
The 1993 Star Trek: The Next Generation episode "The Chase" reveals that the predominance of humanoid species in known space of modern times is the result of a progenitor humanoid species "seeding" various planets with their DNA in order to influence the development of sentient life into forms similar to themselves.
In the 1995 Star Trek: Voyager episode "Tattoo", it is revealed that the human character Chakotay is descended from the Rubber Tree People, a group of Native Americans who were visited by the Sky Spirits 45,000 years ago. The Sky Spirits, who are actually advanced, space-faring aliens, granted these primitive humans a genetic alteration which influenced their development.
Lilith and Adam in the manga/anime series Neon Genesis Evangelion were two extraterrestrial beings that landed on Earth and gave birth to humanity.
While not specifically using Earth as an example, the fictional Star Wars universe has many references to aliens giving primitive races technology, or humans de-advancing into a more primitive society as time passes.
The film Ice Age (2002) briefly shows an alien spacecraft trapped in ice during the ice age.
In the Babylon 5 universe, many of the First Ones, and in particular the Vorlons and Shadows, visited Earth (and the homeworlds of other races) at various times in history.
The Predator race from the movie Alien vs. Predator (2004) is described in the film as having traveled to Earth at a prehistoric time and having a human culture serve them as Gods.
In the animated series Dilbert, Dilbert and Dogbert visit a museum with an exhibit supporting the theory of aliens assisting the Egyptians in the construction of the Pyramid. When Dilbert asks what happened to the aliens after the pyramids were constructed, they move to the next exhibit, which depicts the Egyptians feasting on the aliens.
In the Red Dwarf episode "Waiting for God", Rimmer states his belief in aliens having visited Earth in ancient times, asking Lister how else the pyramids could have been built. Lister replies, "They had massive whips, Rimmer. Massive, massive whips."
In the animated series The Flintstones, leading character Fred is sometimes accompanied by Gazoo, a little green "space man" who exhibits many amazing powers.
Monty Python's Life of Brian includes a chase sequence where Brian briefly escapes from Roman legionaries by accidentally falling into an alien spaceship.
in the television series Earth: Final Conflict, the Atavus species traveled to Earth in the distant past and ruled over it, using Neanderthal men as slaves and a food source. The Atavus were present in Ancient Egypt as well. The Taelons (the series' main aliens) also visited Earth many times before initiating first contact in the mid-21st century.
In the television series Space Island One, the crew of the Unity encounter a Babylonian space probe, the Tower of Babel having been a rocket rather than a literal tower to reach the heavens.
The animated series The Transformers depicts the Autobots and Decepticons as ancient astronauts crash-landing on Earth four million years ago.
The Maximals and Predacons from Beast Wars take this theme one step further by time traveling to prehistoric Earth from the future (their present). They discover that another alien species called the Vok had already visited Earth, using it as an experiment which the Beast Wars had contaminated.
The film Transformers (2007), Megatron chases after a powerful piece of technology from Cybertron and ends up on prehistoric Earth. Over several decades, a secret U.S. government group reverse-engineered many modern human technologies from Megatron's dormant body.
In an episode of Martin Mystery, Martin, his stepsister, and his father are all captured by a Synth, a creature synthesized with human and alien genes (which was giving birth at the time). After looking at the cave paintings in the Synth's cave which seem to depict a UFO dropping off a strange creature on earth, Martin states it was abandoned by its "creators" some thousand years ago. It lived in secrecy until loggers got to its forest.
In another episode of Martin Mystery, Martin, Java, and Diana are sent to investigate paranormal activity at a summer camp. It was discovered that the culprit was Sauros, a reptilian god that demanded the life force of young people every thousand years. It was than discovered that Sauros was not a god but an extraterrestrial that had a thousand-year life cycle.
In the Iron Man: Armored Adventures episode "Dragonseed", it is revealed that reptilian aliens known as Makluans created the Mandarin's ten rings to rule the galaxy, until one went rogue and gave the rings to Temujin's ancestor to use justly.
The film Hangar 18 (1980) involves a UFO whose symbols are found to match those used in ancient cultures.
In the T.V. series Agents of S.H.I.E.L.D., which is set in the same Marvel Cinematic Universe, Kree, advanced alien species, visited ancient Earth to conduct experiments on a group of humans which could make them gain superhuman abilities so that they could create a special warrior clan which could allow them to win in the war against Nova empire. But they thought that their experiments were unsuccessful and they left Earth. However, the genes injected in the human test subjects passed on through generations of their descendants, and created a new species of Inhumans.
NTV, a television station in Newfoundland and Labrador, regularly shows programming centering around Captain Atlantis, an ancient astronaut espousing New Age philosophy, and his protégé, the human Captain Canada. Captain Atlantis is said to be part of a godlike race of ancient aliens from the far edges of the universe who settled in the city of Atlantis (which in the context of the story was located on the Grand Banks of Newfoundland); the rest of his race deliberately hid themselves and Atlantis from mankind to prevent humanity from using it for evil. By adopting New Age philosophies, Captain Atlantis claims humans can gain supernatural powers and eventually use them to achieve world peace. Captain Atlantis and Captain Canada stories are also featured in comic strip form in the Newfoundland Herald.
Frank Zappa's "Inca Roads" (from the album One Size Fits All) deals with Ancient Astronaut Theory. The primary lyric is "Did a vehicle come from somewhere out there just to land in the Andes? Was it round, and did it have a motor, or was it something different? Did a vehicle fly along the mountain and find a place to park itself, or did someone build a place to leave a space for such a thing to land?"
In the Halo series, ancient humanity was a spacefaring society technologically superior to modern humanity, with many worlds colonized and contact established with several alien species. After losing a large-scale war with slightly more technologically advanced, but more wide spread species, the Forerunners, humanity was stripped of their technologies and quarantined to Earth, their home planet. For millennia, the Forerunners exercised influence over humanity's behavior, evolution, and even memories. When an invasive parasitic species threatened all sentient life, the Forerunners eventually decided that their only option was to sterilize the galaxy. Though they established automated preservation and "reseeding" technologies in order to reestablish humans and many other species across the galaxy after the sterilization, the Forerunners sacrificed themselves in order to see the plan through. Later, some of the alien species discovered remnants of Forerunner technology. While they derived many technological innovations from the artifacts, they also misinterpreted much of what they found and worshipped the extinct Forerunners as gods. Eventually regaining spacefaring technology, humans studied the Forerunner artifacts with a more scientific approach. Both the alien species and humanity were surprised to discover that the Forerunners granted humanity alone stewardship over the technology they had been left behind. The reasons for this were only made clear in the most recent novels and Halo 4. The Forerunners themselves were created by aliens far more ancient, of which the Forerunners had only a mythological understanding of.
Dark Void features a race of humanoid shape-shifters called Watchers, who ruled over ancient humans as gods, bringing technology and civilization to Earth. Their human subjects rebelled, and exiled them to the titular Dark Void, an alternate dimension that exists between Earth and the original Watcher homeworld.
In the game Mass Effect humanity discovers a cache of alien technology buried on Mars, built by an alien species known as the Protheans. The Protheans had apparently maintained a vast interstellar empire encompassing the entirety of the Milky Way; the empire collapsed suddenly and mysteriously 50,000 years ago, leaving almost no traces of its existence. It is revealed later in the game that the Protheans, along with numerous interstellar civilizations before them, had been systematically exterminated by a race of artificially intelligent machines called Reapers.
The arcade shoot-em-up Xevious (from Namco 1983, designed by Masanobu Endō) were also deeply inspired on ancient astronaut theories.
In Assassin's Creed II and it's successors, it is gradually revealed that humanity was originally created as a slave race by the then-ruling people tentatively known as the "First Civilization" eons prior to the game's setting. Humanity eventually revolted against their "gods" and full-scale war erupted. This race, as well as humans, were nearly wiped out by a solar flare, forcing the two to compromise a truce to ensure the survival of both. The First Civilization have since, as a distinct species, become extinct, though hybrid bloodlines of the two species still exist; their presence in history has been erased, leaving only remnants of their technology behind which became powerful religious artifacts (the reason behind the Templars' and the Assassins' ongoing war). However, the "First Civilization" did not originate from outer space, having resided on the Earth and evolved over time.
The Cuotl in Rise of Nations: Rise of Legends is a nation of Mesoamerica-inspired tribes subjugated by four extraterrestrial beings who install themselves as deities.