As might be expected these individuals are branded 'psuedohistorians' or similar by the currently acknowledged experts in these fields - however it does seems certain that some different explanation[s] will be necessary eventually that includes a more convincing account of these anomalies. Some of the best known practitioners in this field are listed below.
Magicians of the Gods
From YouTube [8.3.2016]:
Graham Hancock - Magicians of the Gods - HD
From the Telegraph [4.10.2015]: Have the secrets of a lost civilisation finally been unearthed?
"Twenty years ago, [Graham] Hancock set the cat among the academic pigeons when he published a book called Fingerprints of the Gods, a re-evaluation of mankind's past that claimed an advanced civilisation was wiped out by a giant comet towards the end of the last Ice Age.
Based on Hancock's own investigations and interviews with archaeologists and astronomers, the book claimed survivors of this cataclysm, the giant flood remembered in myths all around the world, went on to settle in locations from Mexico to Egypt and impart their ancient knowledge to the other remaining humans.
Among the most attention-grabbing claims in the book were: a suggestion that the Pyramids of Giza were designed to store books of knowledge written by an ancient civilisation; that the Great Sphinx preceded the Ancient Egyptians by many thousands of years; and that Plato, who wrote about Atlantis in his books Timaeus and Critias, knew exactly where the fabled lost city was hidden.
The book was an instant hit and has, to date, sold more than nine million copies around the world. Hancock, a former East Africa correspondent for The Economist, went on to present two documentary series on Channel 4, became a popular lecturer in "alternative history", and built up a strong fan base online.
Now, he has written a sequel to Fingerprints, Magicians of the Gods, which reveals "explosive new evidence" to support his claims. It also warns of another comet strike that is destined to hit Earth in 2030."
But the author says he has never claimed to be an academic. He presents himself as a journalist who is simply reporting theories by scientists who think they can fill in some of the gaps in the history of mankind – holes acknowledged by all mainstream academics.
"Let's get to grips with that first of all," he says. "The foundations upon which history is based look increasingly suspect. Let's no longer shroud ourselves in the illusion that [mainstream] historians and archaeologists are invincible."
"We have fallen out of harmony with the universe… In mythological terms, we tick all the boxes for the next lost civilisation," warns Hancock. "Plato says it very clearly about the citizens of Atlantis: there was a time when they loved a pure and good life but they became arrogant and cruel and no longer bore their prosperity with moderation. I think we sound a lot like that."
Is Hancock really suggesting that the universe is going to punish us in 2030 for our immoral society? That seems an outrageous claim, even by his standards. He leans forward and looks me directly in the eye: "I'm saying that that is what the ancient traditions suggest."
The full article can be read here.
From YouTube [27.6.2014]:
Graham Hancock Breaks his Set on TED Censorship, Lost Civilisations & War on Consciousness
Fingerprints of the Gods
Graham Hancock - Fingerprints of the Gods - Full length presentation
Fingerprints of the Gods: The Evidence of Earth's Lost Civilization is a book first published in 1995 by Graham Hancock, in which he echoes 19th century writer Ignatius Donnelly, author of Atlantis: The Antediluvian World (1882), in contending that some previously enigmatic ancient but highly advanced civilization had existed in prehistory, one which served as the common progenitor civilization to all subsequent known ancient historical ones. The author proposes that sometime around the end of the last Ice Age this civilization ended in cataclysm, but passed on to its inheritors profound knowledge of such things as astronomy, architecture, and mathematics. His theory is based on the idea that mainstream interpretations of archaeological evidence are flawed or incomplete.
The book pivots on "fingerprints" of allegedly influenced civilizations, evidence of which Hancock finds in the descriptions of Godmen like Osiris, Thoth, Quetzalcoatl, and Viracocha. These creation myths predate history, and Hancock suggests that in 10,450 BC, a major pole shift took place, before which Antarctica lay farther from the South Pole than today, and after which it shifted to its present location. This earlier civilization theoretically centered on Antarctica, and later survivors built the Olmec, Aztec, Maya and Egyptian civilizations.
Hancock was influenced by Rose and Rand Flem-Ath's When the Sky Fell: in Search of Atlantis (1995/2009), in which they expand the evidence for Charles Hapgood's theory of earth-crust displacement and propose Antarctica as the site of Atlantis.
The pole-shift hypothesis hinges on Charles Hapgood's theory of Earth Crustal Displacement. Hapgood had a fascination with the story of Atlantis and suggested that crustal displacement may have caused its destruction. His theories have few supporters in the geological community compared to the more widely accepted model of plate tectonics.
The title of the book seems to reference Erich von Däniken's earlier book, Chariots of the Gods? (1968), which examines much of the same archaeological, geological and historical evidence as Hancock does but reaches a radically different conclusion as to the origin and significance of such evidence.
As always, use this info to gather more info.
Graham Hancock (/ˈhænkɒk/; born 2 August 1950) is a British writer and journalist. Hancock specialises in unconventional theories involving ancient civilisations, stone monuments or megaliths, altered states of consciousness, ancient myths and astronomical/astrological data from the past. One of the main themes running through many of his books is a posited global connection with a "mother culture" from which he believes all ancient historical civilisations sprang. An example of pseudoarchaeology, his work has neither been peer reviewed nor published in academic journals.
Erich von Däninnen [From Wikipedia]
Erich Anton Paul von Däniken (/ˈɛrᵻk fɒn ˈdɛnᵻkᵻn/; German: [ˈeːrɪç fɔn ˈdɛːnɪkən]; born 14 April 1935) is a Swiss author of several books which make claims about extraterrestrial influences on early human culture, including the best-selling Chariots of the Gods?, published in 1968. Däniken is one of the main figures responsible for popularizing the "paleo-contact" and ancient astronauts hypotheses. The ideas put forth in his books are rejected by a majority of scientists and academics, who categorize his work as pseudohistory, pseudoarchaeology and pseudoscience.
Däniken later became a co-founder of the Archaeology, Astronautics and SETI Research Association (AAS RA). He designed Mystery Park (now known as Jungfrau Park), a theme park located in Interlaken, Switzerland, that opened in May 2003.
Zechariah Sitchin [From Wikipedia]
Sitchin's ideas have been rejected by scientists and academics, who dismiss his work as pseudoscience and pseudohistory. His work has been criticized for flawed methodology and mistranslations of ancient texts as well as for incorrect astronomical and scientific claims.
Lloyd Pye on Human Origins, Anunnaki and Nibiru...
The late author Lloyd A. Pye (September 7, 1946 – December 9, 2013) claimed that a superior alien race called the Anunnaki from the planet Nibiru incrementally terraformed and populated Earth for their own reasons, later returning to Earth and, through a process of genetic manipulation, produced humans. These ideas supposedly come from translating and interpreting ancient Sumerian texts (Anunnaki and Nibiru are names from Sumerian religious myths). Pye argued that these alien beings are responsible for the megalithic structures around the world, the growth and advancement of Sumer, the domestication of plants and animals, and supposedly strange flaws in human DNA. (Those who are well read in pseudoscience will realize that most of his ideas have been... inspired by the claims of Erich von Däniken and Zecharia Sitchin.
From Wikipedia Lloyd Anthony Pye Jr. (September 7, 1946 – December 9, 2013) was an American author and paranormal researcher best known for his promotion of the Starchild skull. He claimed it was the relic of a human-alien hybrid, although DNA testingshowed it to be from a human male. He also promoted the ideas that cryptozoological creatures such as Bigfoot are real and that aliens intervened in human development.