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Old 23rd February 2018, 11:37 AM
abuelita abuelita is offline
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Fireballs! Extinctions! The Biomass Burns!

An important new paper - actually a two-parter about the almost-demise of humans, caused by the Younger Dryas comet impact. This fits really, really well with the super-extreme bottle-neck exhibited in mtDNA variation - and no doubt the gene pool in general. Look at this chart before you read the paper. (I've lost my attribution information. Can anyone supply?)

KU's promo piece
Paper part 1
Paper part 2

"The Younger Dryas boundary (YDB) cosmic-impact hypothesis is based on considerable evidence that Earth collided with fragments of a disintegrating ≥100-km-diameter comet, the remnants of which persist within the inner solar system ∼12,800 y later. Evidence suggests that the YDB cosmic impact triggered an “impact winter” and the subsequent Younger Dryas (YD) climate episode, biomass burning, late Pleistocene megafaunal extinctions, and human cultural shifts and population declines. "
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Old 27th February 2018, 07:46 PM
Carpathian Carpathian is offline
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Great Balls of Fire!

Who cares! Why should anyone care?
Today you are more likely to be killed in a car crash.

"What me Worry?" (Alfred E. Newman)
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Old 4th March 2018, 02:35 AM
dna dna is offline
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Quote:
Originally Posted by abuelita View Post
An important new paper - actually a two-parter about the almost-demise of humans, caused by the Younger Dryas comet impact. This fits really, really well with the super-extreme bottle-neck exhibited in mtDNA variation - and no doubt the gene pool in general. Look at this chart before you read the paper. (I've lost my attribution information. Can anyone supply?) [----]
Sure.

The picture comes from the corrections that were published by the original team of authors...
http://dx.doi.org/10.1016/j.cub.2016.02.022
http://www.cell.com/current-biology/...%2930074-4.pdf

The original paper was
Pleistocene Mitochondrial Genomes Suggest a Single Major Dispersal of Non-Africans and a Late Glacial Population Turnover in Europe
Posth, Cosimo et al.
Current Biology, Volume 26, Issue 6, 827-833
https://doi.org/10.1016/j.cub.2016.01.037


Mr. W.

P.S.
That picture is not a proof for extinctions.
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