No, the problem at Göbekli Tepe is the pristine, sudden appearance, like Athena springing full-grown and fully armed from the brow of Zeus, of what a… - Graham Hancock

It concerns the growing body of evidence that 12,800 years ago a giant comet traveling on an orbit that took it through the inner solar system broke up into multiple fragments, and that many of these fragments, some more than a mile (2.4 kilometers) in diameter, hit the earth. It is believed that North America was the epicenter of the resulting cataclysm with several of the largest impacts on the North American ice cap causing floods and tidal waves and throwing a vast cloud of dust into the upper atmosphere that enshrouded the earth, preventing the sun's rays from reaching the surface and thus initiating the sudden, mysterious global deep freeze that geologists call the Younger Dryas. We will go into the evidence for all this, and how it relates to "Bretz's flood"

Quetzalcoatl, the Feathered Serpent, [...] came to teach [the ancient inhabitants of Mexico] the benefits of settled agriculture and the skills necessary to build temples. Although this deity is frequently depicted as a serpent, he is more often shown in human form — the serpent being his symbol and his alter ego — and is usually described as "a tall bearded white man" ... "a mysterious person ... a white man with a strong formation of body, broad forehead, large eyes and a flowing beard." Indeed, [...] the attributes and life history of Quetzalcoatl are so human that it is not improbable that he may have been an actual historical character ... the memory of whose benefactions lingered after his death, and whose personality was eventually deified. The same could very well be said of Oannes — and just like Oannes at the head of the Apkallu (likewise depicted as prominently bearded) it seems that Quetzalcoatl traveled with his own brotherhood of sages and magicians. We learn that they arrived in Mexico "from across the sea in a boat that moved by itself without paddles," and that Quetzalcoatl was regarded as having been "the founder of cities, the framer of laws and the teacher of the calendar."

If the normal portolano is indeed derived from the lost atlas of Marinus of Tyre, then it follows that other high-quality maps of regions much further afield than the Mediterranean and the Black Sea, and indeed a world map, might also have been preserved by the Arabs — for we know from Ptolemy's testimony that other Marinus maps, including a world map, did once exist. It will therefore do no harm to keep an open mind to the possibility that the portolan world maps that began to appear during the century after the Carta Pisane, might also have been influenced by earlier 'Tyrian sea-fish' maps of Phoenician origin. Christopher Columbus, whose passionate belief in lands across the Atlantic lead to his 'discovery' of the New World, seems to hint at a Phoenician connection when he describes one of the inspirations for his journey:
'Aristotle in his book On Marvellous Things reports a story that some Carthaginian merchants sailed over the Ocean Sea to a very fertile island ... this island some Portuguese showed me on their charts under the name Antilia.'
Antilia first appears on a portolan chart of 1424. It is a mysterious presence there, a riddle.