[uglybiker]

The Younger Dryas lasted a thousand years and coincided with the extinction of mammoths ...began when a comet or meteorite struck North America.

Something that big would've left a crater.

Where is it?

[huldah1776]

According to this article the woolies survived on an island up to 3600 years ago. Which begs me to question exactly why would a mammal covered in fur, die from the cold except for lack of food. I bet they died from global warming because they overheated with those coats on.

http://io9.com/5896262/the-last-mammoths-died-out-just-3600-years-agobut-they-should-have-survived

this was a friday silliness post.

[BroJoeK]

uglybiker: "Something that big would've left a crater. Where is it?"

More info on the Younger Dryas Impact Hypothesis:

• "The Younger Dryas Impact hypothesis, also known as the Clovis comet hypothesis, is one of the competing scientific explanations for the onset of the Younger Dryas cold period.
  The hypothesis, which scientists continue to debate, proposes that the climate of that time was cooled by the impact or air burst of one or more comets..[1][2][3]

• "Though no major impact crater has been identified, the proponents suggest that it would be physically possible for such an air burst to have been similar to but orders of magnitude larger than the Tunguska event of 1908.[5][6]
  The hypothesis proposed that animal and human life in North America not directly killed by the blast or the resulting wildfires would have suffered due to the disrupted ecologic relationships affecting the continent...

• "Recent evidence continues to oppose the YDB impact hypothesis.
  New research, which analyzed sediments claimed, by the hypothesis proponents, to be deposits resulting from a bolide impact were, in fact, dated from much later or much earlier time periods than the proposed date of the cosmic impact..." etc., etc.

Bottom line: this particular explanation -- Younger Dryas Impact hypothesis -- is not doing so well, seems headed for the scientific dust-bin.

[Malone LaVeigh]

Something that big would've left a crater. Where is it?

I don't really keep up on this stuff, but I recall that at one time they speculated that it could be ...

[Lazamataz]

The Younger Dryas lasted a thousand years and coincided with the extinction of mammoths ...began when a comet or meteorite struck North America.

Something that big would've left a crater. Where is it?

My face.

[SunkenCiv]

Actually, the impact a few years ago in Russia left no crater, because the object detonated before it could strike the surface.

But the Clovis object hit the icecap. It’s all in the book above.