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Oh, you should've been here a few minutes ago. Someone tried to say it wasn't politically relevant and suggested the Science forum.
how good of you to openly admit that your only interest in this was the extent to which you could use it as a political brickbat
hello from the science forum
Quote:
Originally Posted by Mircea
Actually it is controversial, because it is related to our Warming Globe.
Thanks to satellites and ground penetrating radar and a number of other finds, we are beginning to get a clearer picture of what happened.
There is now more than mere circumstantial evidence that Earth was hit by an impactor that broke apart; that it cause a global tsunami that is related in myth as "flood stories"; that this also brought an abrupt and early end to the Ice Age; and that it caused a brief period of global cooling which resulted in the extinction of certain classes of animals, namely saber-tooth tigers, mastodons, wooly mammoths, giant sloths, giant bears et al.
Had that event not occurred, the Ice Age would be ending perhaps now, and so you can see the relevance.
Controversially...
Mircea
that's news to me. got a link where i can see for myself?
Fisher believes humans killed the mammoth because markings on its bones are not consistent with the markings a lions' deep teeth would create, but instead with a human-wielded knife.
"The marks are suggestive of human activity," he said. "It doesn’t look like wolves, it doesn’t look like lions, it doesn't look like bears."
Fisher said the level of preservation of the animal's carcass is unusually high.
I thought the Younger Dryas impact event was discredited.
Not sure of all the details, and whether it applied to Russia. I thought it was N. America.
I think that Dr. Allen West did a really good job showing numerous evidence (impact markers) including the ''needle in the haystack'' nanodiamonds that could only have been from an exploding comet and not via volcanic.
Fisher believes humans killed the mammoth because markings on its bones are not consistent with the markings a lions' deep teeth would create, but instead with a human-wielded knife.
"The marks are suggestive of human activity," he said. "It doesn’t look like wolves, it doesn’t look like lions, it doesn't look like bears."
Fisher said the level of preservation of the animal's carcass is unusually high.
Yeap as we humans were hunter gatherers est 1.8 million b.c. to 10,000 b.c. and so that's not surprising the least. That being said i still believe that the catastrophic North American even (Younger Dryas) had a major impact on their demise including the inhabiting humans (Clovis peoples) at least in North America.
i honestly didn't know much about this so i 'did a little research,' as C-D people are so fond of saying..
Quote:
Science Magazine Mammoth-Killer Impact Flunks Out
After a new study failed to find nanodiamonds, impact experts are flatly rejecting outsiders' claims that an impact 12,900 years ago devastated the megafauna.
Did a continent-searing comet impact wipe out the mammoths and other great beasts? Impact specialists have now weighed in on that widely publicized possibility. Their verdict: There never was a mammoth-killer impact. Proponents' evidence “is not internally consistent, not reproducible, and certainly not consistent with being produced by impact,” says geochemist Christian Köberl of the University of Vienna, who has been publishing on impacts for 27 years.
Quote:
ScienceDirect.com - Earth-Science Reviews - The Younger Dryas impact hypothesis: A requiem The Younger Dryas impact hypothesis: A requiem
In summary, none of the original YD impact signatures have been subsequently corroborated by independent tests. Of the 12 original lines of evidence, seven have so far proven to be non-reproducible. The remaining signatures instead seem to represent either (1) non-catastrophic mechanisms, and/or (2) terrestrial rather than extraterrestrial or impact-related sources. In all of these cases, sparse but ubiquitous materials seem to have been misreported and misinterpreted as singular peaks at the onset of the YD. Throughout the arc of this hypothesis, recognized and expected impact markers were not found, leading to proposed YD impactors and impact processes that were novel, self-contradictory, rapidly changing, and sometimes defying the laws of physics. The YD impact hypothesis provides a cautionary tale for researchers, the scientific community, the press, and the broader public.
From the articles I've seen, there was nothing mentioned about impacts.
You just have to research it as there's plenty of articles supporting the hypothesis of an shattering comet impacting North America around 12,900 years ago.
Pertaining to the Science Direct article that someone had posted earlier The Younger Dryas impact hypothesis: A requiem.
''In summary, none of the original YD impact signatures have been subsequently corroborated by independent tests'' is a false statement as the science show Nova themselves had independent verification by having scientists Chris Mercer U C Santa Barbara and Paul Mayewski U of Maine who both specialize in ancient earth materials and climate review the Greenland Ice Core samples and so verifyed that at the specific time of 13,900 years ago in the Greenland Core layer that there is indeed high levels of hexagonal shaped nanodiamonds that are only produced by high impact explosion.
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