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richarddullum wrote:

> What is key here is that the plants which formed the base of
> that ecosystem could not grow above the Arctic circle, even if
> it were warmer, because the land is in perpetual darkness 6
> months out of the year.

Only at the Poles is there perpetual darkness for 6 months of the year.

On the Arctic Circle, there is perpetual darkness for 1 day a year - this increases as one moves northwards.

Plants grow quite readily within the Arctic Circle today. Greenland once had quite extensive forests until the Vikings chopped all the trees down and their livestock prevented regrowth .....

There is no reason to suppose that species capable of living in very cold, arid, steppe environments today could not have done so 40,000 years ago.

Also worth remembering than the Ice Age was not a period of continuous cold - some interstadials were as warm as today.

However, were, for example, Siberia further south then we might well have serious problems in explaining the presence of cold, arid, steppe adapted megafauna

btw the megafauna died out in Siberia because it turned wetter - and those which retreated to refugiums, in which they might otherwise have survived, met a new deadly killer called homo sapien. Large species have slow reproductive rates and a combination of reduced population and increased predation led to the inevitable.



Andy
Extraordinary claims require at least some evidence.

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Subject Views Written By Posted
I found something big..... 532 andre.chaisson 14-Jan-10 23:05
Re: I found something big..... 323 Ahatmose 15-Jan-10 00:14
Re: I found something big..... 338 andre.chaisson 15-Jan-10 00:57
Off topic for Ahatmose 351 Absinthujone 15-Jan-10 04:38
Re: I found something big..... 335 andre.chaisson 15-Jan-10 00:52
Re: I found something big..... 269 obsolete 15-Jan-10 01:31
Re: I found something big..... 337 andre.chaisson 15-Jan-10 01:59
Take it easy, Andre... 311 Absinthujone 15-Jan-10 03:53
Re: Take it easy, Andre... 330 Absinthujone 15-Jan-10 04:16
Re: I found something big..... 398 andre.chaisson 15-Jan-10 12:43
Re: I found something big..... 369 Absinthujone 15-Jan-10 13:45
Re: I found something big..... 275 andre.chaisson 15-Jan-10 14:05
Re: I found something big..... 329 NetWorkAngel 15-Jan-10 15:02
Re: I found something big..... 339 andre.chaisson 15-Jan-10 20:36
Re: I found something big..... 330 andre.chaisson 15-Jan-10 20:44
Re: I found something big..... 318 andre.chaisson 15-Jan-10 21:14
The Core Samples Already Exist and Hace Been Described and Published 314 Xebec 10-Feb-10 04:37
Re: I found something big..... 354 JonnyMcA 16-Jan-10 14:17
Re: I found something big..... 306 andre.chaisson 16-Jan-10 18:26
Re: I found something big..... 259 JonnyMcA 16-Jan-10 19:41
Re: I found something big..... 356 richarddullum 27-Jan-10 03:30
Re: I found something big..... 305 Essan 27-Jan-10 14:48
Re: I found something big..... 267 Green Ruby 01-Feb-10 00:30
Re: I found something big..... 294 Ahatmose 01-Feb-10 03:48
Re: I found something big..... 271 Feralkiwi 01-Feb-10 02:32
Otto Muck's Atlantic "Craters" 2100 Xebec 11-Feb-10 02:02
Re: I found something big.....Yeah: GOOD MUSIC!! 348 Avatar 01-Feb-10 15:05
Re: I found something big.....Yeah: GOOD MUSIC!! 359 andre.chaisson 01-Feb-10 21:06
Need Some Hard Data 400 Xebec 10-Feb-10 04:26
Re: Need Some Hard Data 307 Ahatmose 10-Feb-10 20:30


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