No, a Comet Didn't Destroy Advanced Civilization 12800 Years Ago
Scientific evidence in the links below.
In this video, we will talk about a hypothesis that has been hitting the media trying to connect the recent discovery of a crater in Greenland with extinction of human civilizations and megafauna. Here are some facts instead.
More about the crater: http://advances.sciencemag.org/content/4/11/eaar8173
An article discrediting some of the "collision" evidence:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4040610/
Possible glaciation explanations:
https://en.wikipedia.org/wiki/Younger_Dryas#Causes
Extinction event:
https://en.wikipedia.org/wiki/Quaternary_extinction_event
An article discussing this idea in more detail:
https://www.scientificamerican.com/article/no-there-wasnt-an-advanced-civilization-12-000-years-ago/
Further scientific proof from most recent research:
Megafauna in Americas and Siberia went extinct at different times:
https://link.springer.com/chapter/10.1007%2F978-1-4020-8793-6_2
Widespread fires linked to human activity not asteroids:
https://www.ncbi.nlm.nih.gov/pubmed/19190185
Retesting of samples of nanodiamonds (most recent):
https://www.ncbi.nlm.nih.gov/pubmed/27391147
Another retest of samples finding no evidence:
https://onlinelibrary.wiley.com/doi/abs/10.1002/jqs.2914
Australian large animals went extinct much earlier and coincided with arrival of humans:
https://www.ncbi.nlm.nih.gov/pubmed/18695222
No evidence of any nano diamonds:
https://www.ncbi.nlm.nih.gov/pubmed/20805511
Independent report of the impact hypothesis:
https://www.ncbi.nlm.nih.gov/pubmed/19822748
Absence of geochemical signs of impact:
https://www.ncbi.nlm.nih.gov/pubmed/20007789
Some videos where the opposite ideas are mentioned:
https://www.youtube.com/watch?v=Ygv6hesk3JQ
https://www.youtube.com/watch?v=hMTTFLiOwX0&t=703s
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