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Underworld: The Mysterious Origins of Civilization QUOTES

15 " Even if we admit that running-survey and compass techniques were somehow being used on ships to produce sea-charts as early as the thirteenth century (which most historians of science would rule out) we still come against the unexplained enigma of the miraculous and fully formed de novo appearance of the Carta Pisane. As we've seen, not a single chart pre-dates it that demonstrates in any way the gradual build-up of coastal profiles across the whole extent of the Mediterranean that must have occurred before a likeness as perfect as this could have been resolved.
It is possible, of course, through the vicissitudes of history, that all the evidence for the prior evolution of portolans before the Carta Pisane has simply been lost. If that were the case, however -- in other words if the Carta Pisane is a snapshot of a certain moment in the development of an evolving genre of maps, and if we accept that all earlier 'snap-shots' have been lost, wouldn't we nevertheless expect that such an 'evolving genre' would have continued to evolve after the date of the earliest surviving example?
Whether we set the date of the Pisane between 1270 and 1290 [...] or a little later -- between 1295 and 1300 -- as other scholars have argued, we've seen that there was no significant evolution afterwards.
Now kept in the Bibliothèque Nationale in Paris, the enigmatic Pisane is an unsigned chart and scholars have no idea who the cartographer might have been. "

Graham Hancock , Underworld: The Mysterious Origins of Civilization

20 " Areas that are densely populated today, Chicago, New York, Manchester, Amsterdam, Hamburg, Berlin, Moscow -- in fact most of North America and northern Europe -- were absolutely uninhabitable due to the fact that they were covered by ice-caps several kilometers thick. Conversely, many areas that are uninhabitable today -- on account of being on the bottom of the sea, or in the middle of hostile deserts such as the Sahara (which bloomed for about 4000 years at the end of the last Ice Age) -- were once (and relatively recently) desirable places to live that were capable of supporting dense populations.
Geologists calculate that nearly 5 per cent of the earth's surface -- an area of around 25 million square kilometers or 10 million square miles -- has been swallowed by rising sea-levels since the end of the Ice Age. That is roughly the equivalent to the combined areas of the United States and the whole of South America. It is an area almost three times as large as Canada and much larger than China and Europe combined.
What adds greatly to the significance of these lost lands of the last Ice Age is not only their enormous area but also -- because they were coastal and in predominantly warm latitudes -- that they would have been among the very best lands available to humanity anywhere in the world at that time. Moreover, although they represent 5 per cent of the earth's surface today, it is worth reminding ourselves that humanity during the Ice Age was denied useful access to much of northern Europe and North America because of the ice-sheets. So the 25 million square kilometers that were lost to the rising seas add up to a great deal more than 5 per cent of the earth's useful and habitable landspace at that time. "

Graham Hancock , Underworld: The Mysterious Origins of Civilization