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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..... 501 andre.chaisson 14-Jan-10 23:05
Re: I found something big..... 315 Ahatmose 15-Jan-10 00:14
Re: I found something big..... 315 andre.chaisson 15-Jan-10 00:57
Off topic for Ahatmose 338 Absinthujone 15-Jan-10 04:38
Re: I found something big..... 312 andre.chaisson 15-Jan-10 00:52
Re: I found something big..... 259 obsolete 15-Jan-10 01:31
Re: I found something big..... 313 andre.chaisson 15-Jan-10 01:59
Take it easy, Andre... 295 Absinthujone 15-Jan-10 03:53
Re: Take it easy, Andre... 319 Absinthujone 15-Jan-10 04:16
Re: I found something big..... 372 andre.chaisson 15-Jan-10 12:43
Re: I found something big..... 358 Absinthujone 15-Jan-10 13:45
Re: I found something big..... 251 andre.chaisson 15-Jan-10 14:05
Re: I found something big..... 316 NetWorkAngel 15-Jan-10 15:02
Re: I found something big..... 314 andre.chaisson 15-Jan-10 20:36
Re: I found something big..... 300 andre.chaisson 15-Jan-10 20:44
Re: I found something big..... 293 andre.chaisson 15-Jan-10 21:14
The Core Samples Already Exist and Hace Been Described and Published 301 Xebec 10-Feb-10 04:37
Re: I found something big..... 343 JonnyMcA 16-Jan-10 14:17
Re: I found something big..... 279 andre.chaisson 16-Jan-10 18:26
Re: I found something big..... 249 JonnyMcA 16-Jan-10 19:41
Re: I found something big..... 343 richarddullum 27-Jan-10 03:30
Re: I found something big..... 294 Essan 27-Jan-10 14:48
Re: I found something big..... 253 Green Ruby 01-Feb-10 00:30
Re: I found something big..... 278 Ahatmose 01-Feb-10 03:48
Re: I found something big..... 258 Feralkiwi 01-Feb-10 02:32
Otto Muck's Atlantic "Craters" 2040 Xebec 11-Feb-10 02:02
Re: I found something big.....Yeah: GOOD MUSIC!! 335 Avatar 01-Feb-10 15:05
Re: I found something big.....Yeah: GOOD MUSIC!! 332 andre.chaisson 01-Feb-10 21:06
Need Some Hard Data 388 Xebec 10-Feb-10 04:26
Re: Need Some Hard Data 295 Ahatmose 10-Feb-10 20:30


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