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This impact would have been powerful enough to melt the ground, and could have killed off many large mammals and humans. It may even have set off a period of unusual cold called the Younger Dryas that began at that time, researchers say
In addition to the Mexican site, the scientists have found signs of an impact in Canada, the United States, Russia, Syria and various sites in Europe. And all of these bits of evidence were found buried in a thin layer of rock that dates to precisely 12,900 years ago.
At the same time that the impact may have taken place — 12,900 years ago — Earth was beginning a mini ice age. It is known that many large animals, such as the mammoth and the saber-toothed cat, did not survive this age. There's even evidence of a population decline in humans living in North America at the time, called the Clovis culture.
If a comet, which would have been traveling at about 30 miles per second, impacted Earth's atmosphere, it would have created a flash of extreme heat reaching about 3,000 to 4,000 degrees Fahrenheit (1,600 to 2,200 degrees Celsius).
Whether the general mammoth population died out for climatic reasons or due to overhunting by humans is controversial. Another theory suggests mammoths may have fallen victim to an infectious disease. A combination of climate change and hunting by humans may be a possible explanation for their extinction. Homo erectus is known to have consumed mammoth meat as early as 1.8 million years ago. A site in Ukraine suggests Neanderthals built dwellings using mammoth bones
Originally posted by Illustronic
reply to post by SageBeno
The point you make that some large and even worldwide ancient civilizations could be lost and unknown today is still valid, until proven otherwise.
Originally posted by geobro
reply to post by OccamsRazor04
in 1912 a bank collapsed in siberia it was filled with mammoths and trees . reports say they fed the slay dogs on the meat . in the late 1800s an autopsy revealed that they froze INSTANTLY & were in perfect health . darwin & his followers brushed that one under the carpet
While frozen mammoth carcasses had been excavated by Europeans as early as 1728 (by German scientist Daniel Messerschmidt), the first mammoth fossil fully documented by modern science was discovered near the delta of the Lena River in 1799 by Ossip Schumachov, a Siberian hunter. Schumachov allowed it to thaw (a process taking several years) until he could retrieve the tusks for sale to the ivory trade in Yakutsk. He then abandoned the specimen, allowing it to largely decay before its recovery, possibly even having been partially devoured by modern wolves.
Stories abound about frozen mammoth carcasses that were still edible once defrosted, but the original sources indicate the carcasses were, in fact, terribly decayed, and the stench so unbearable that only the dogs accompanying the finders, and wild scavengers, showed any interest in the flesh.
Preserved frozen remains of woolly mammoths, with much soft tissue remaining, have been found in the northern parts of Siberia. This is a rare occurrence, essentially requiring the animal to have been buried rapidly in liquid or semi-solids such as silt, mud and icy water, which then froze. This may have occurred in a number of ways. Mammoths may have been trapped in bogs or quicksands and either died of starvation or exposure, or drowning if they sank under the surface. The evidence of undigested food in the stomach and seed pods still in the mouth of many of the specimens suggests neither starvation nor exposure are likely. The maturity of this ingested vegetation places the time period in autumn rather than in spring when flowers would be expected. The animals may have fallen through ice into small ponds or potholes, entombing them. Many are certainly known to have been killed in rivers, perhaps through being swept away by river floods. In one location, by the Berelekh River in Yakutia in Siberia, more than 8,000 bones from at least 140 individual mammoths have been found in a single spot, apparently having been swept there by the current.