[Renfield]

Ping

[Paladin2]

This goes against the consensus, it must be wrong...

[Avid Coug]

So, I guess under modern climatology standards, these renegade scientists would be called Comet Climate Change deniers.

[logi_cal869]

Oh, heaven NO!!!!!

A global climate change event in recent human history both unexplained and unable to be attached to human activities.

OH THE HORROR!!

/s

(the sun can’t possibly have anything to do with it, of course)

/s/s

[minnesota_bound]

I always thought the global warming was caused by Fred Flintstone and Barney Rubble and their friends.

[JimSEA]

“changes in ocean circulation patterns caused by glacial meltwater entering the ocean”

In view of the dramatic meltwater created Washington Scablands, and other rapid release of meltwater like Hudson Bay, I’ll stick with temporary ocean current disruption.

[Sherman Logan]

In North America, the Ice Age was marked by the mass extinction of several dozen genera of large mammals, including mammoths, mastodons, American horses, Western camels, two types of deer, ancient bison, giant beaver, giant bears, sabre-toothed cats, giant bears, American cheetahs, and many other animals, as well as plants.

For quite a while the consensus theory was that this extinction was caused by human hunters.

I used to be quite resistant to this notion, as it just seem unlikely to me that human stone age hunters could exterminate so many animal across an entire continent in just a few centuries.

However, we have good the same thing happened in Australia, New Zealand, Madagascar and other islands. The mega-fauna disappeared within a couple of centuries of humans showing up.

So I'm a somewhat reluctant convert.

[Colonel_Flagg]

But theories about the cause of this abrupt climate change are numerous. They range from changes in ocean circulation patterns caused by glacial meltwater entering the ocean to the cosmic-impact theory.

Clearly, the Clovis' SUVs are to blame.

[mj81]

There was a comet, unlike any other thus far observed, that impacted in the Southern Ocean and flooded the former abyss where we evolved. Explained in a slide presentation here:

http://www.threeimpacts-twoevents.com/wp-content/uploads/2013/08/COMET-IMPACT-ANALYSIS-AND-EFFECTS-20Aug2013.pdf

When? Perhaps it caused YD, perhaps it was more recent....