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Analysis of deep sediments around the Nile River in Egypt has shown a massive drought 4,200 years ago contributed to the end of Egypt’s pyramid-building era, according to a new U.S. study.
A team of researchers looked at fossilized pollen and microscopic charcoal in a sediment core spanning 7,000 years of history, and compared changes with archaeological and historical records.
“The study geologically demonstrates that when deciphering past climates, pollen and other micro-organisms, such as charcoal, can augment or verify written or archaeological records—or they can serve as the record itself if other information doesn’t exist or is not continuous,” explained study co-author Benjamin Horton at the University of Pennsylvania in a press release.
The team used charcoal as an indicator of drought-associated fires, predicting a decline in wetland pollen and an increase in charcoal during arid conditions.
Originally posted by benrl
Its funny how something as simple as bad weather can topple empires.
Wonder of our civilization has become advanced and robust enough to survive something like a mass famine.
Unfortunatly cooporation seems to be in short supply.And yea imo a prolonged drought can topple even a great civilization.
Originally posted by SLAYER69
reply to post by crazyguy2012
We are a global community now with mass transportation. In this case, Technology can work for us. It seems reasonable to assume as some of Earth's regions become less productive others will become more productive.
It will just take more cooperation
Originally posted by SLAYER69
reply to post by crazyguy2012
I have a somewhat out there theory on that. I think the poles shifted. [Not as drastically as many DOOM Sayers would have you believe] just a degree or so, just enough to screw up those ancient civilizations.
The Northern Ice age ice cap was over large parts of North America and Northern Europe. I suspect that it wasn't centered over the North pole as we know it today
Identifying dominant factor Milankovitch believed that decreased summer insolation in northern high latitudes was the dominant factor leading to glaciation, which led him to (incorrectly) deduce an approximate 41ka period for ice ages.[16] Subsequent research has shown that the 100ka eccentricity cycle is more important, resulting in 100,000-year ice age cycles of the Quaternary glaciation over the last few million years.
Originally posted by SLAYER69
reply to post by crazyguy2012
I have a somewhat out there theory on that. I think the poles shifted. [Not as drastically as many DOOM Sayers would have you believe] just a degree or so, just enough to screw up those ancient civilizations.
The Northern Ice age ice cap was over large parts of North America and Northern Europe. I suspect that it wasn't centered over the North pole as we know it today
Published: July 19, 2012 Facebook Twitter Google+ E-mail Share Print Reprints KANSAS CITY, Mo. — The drought that has settled over more than half of the continental United States this summer is the most widespread in more than half a century. And it is likely to grow worse.
Originally posted by SLAYER69
reply to post by crazyguy2012
I have a somewhat out there theory on that. I think the poles shifted. [Not as drastically as many DOOM Sayers would have you believe] just a degree or so, just enough to screw up those ancient civilizations.
The Northern Ice age ice cap was over large parts of North America and Northern Europe. I suspect that it wasn't centered over the North pole as we know it today
Originally posted by SLAYER69
reply to post by Sulie
Of course it's cyclical.
I've never denied that. It was just a theory of mine. The Earth's climate is very dynamic, always has been. Do you deny that it is a possibility?
Source
The cave of swimmers has a different geology. It is located in granite, so it is not the place of a spring. But it is located at the bottom of a wadi, a valley which once contained a river. So it is a cave formed by the flowing water at the undercut slope. It is easy to understand, why peolpe would draw swimming people, while sitting at the banks of a river. A last piece in the puzzle is the question how the paintings remained in the extreme climate of the desert. It seems, the natural pigments of the colours can resist temperatur changes very good. Paintings on certain rocks, where the surface is eroded by temperature changes, are lost forever. But granite is rather resistant. And the last problem is light, especially ultraviolett light, which destroys many colours (bleaching). Almásy: descries the absence of pintings in the part of the cave, which is reached by sunlight. It seems that direct sunlight destroyed the paintings at this place.