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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..... 441 andre.chaisson 14-Jan-10 23:05
Re: I found something big..... 281 Ahatmose 15-Jan-10 00:14
Re: I found something big..... 272 andre.chaisson 15-Jan-10 00:57
Off topic for Ahatmose 301 Absinthujone 15-Jan-10 04:38
Re: I found something big..... 264 andre.chaisson 15-Jan-10 00:52
Re: I found something big..... 239 obsolete 15-Jan-10 01:31
Re: I found something big..... 261 andre.chaisson 15-Jan-10 01:59
Take it easy, Andre... 271 Absinthujone 15-Jan-10 03:53
Re: Take it easy, Andre... 292 Absinthujone 15-Jan-10 04:16
Re: I found something big..... 329 andre.chaisson 15-Jan-10 12:43
Re: I found something big..... 337 Absinthujone 15-Jan-10 13:45
Re: I found something big..... 206 andre.chaisson 15-Jan-10 14:05
Re: I found something big..... 295 NetWorkAngel 15-Jan-10 15:02
Re: I found something big..... 258 andre.chaisson 15-Jan-10 20:36
Re: I found something big..... 252 andre.chaisson 15-Jan-10 20:44
Re: I found something big..... 241 andre.chaisson 15-Jan-10 21:14
The Core Samples Already Exist and Hace Been Described and Published 269 Xebec 10-Feb-10 04:37
Re: I found something big..... 319 JonnyMcA 16-Jan-10 14:17
Re: I found something big..... 237 andre.chaisson 16-Jan-10 18:26
Re: I found something big..... 224 JonnyMcA 16-Jan-10 19:41
Re: I found something big..... 307 richarddullum 27-Jan-10 03:30
Re: I found something big..... 257 Essan 27-Jan-10 14:48
Re: I found something big..... 228 Green Ruby 01-Feb-10 00:30
Re: I found something big..... 243 Ahatmose 01-Feb-10 03:48
Re: I found something big..... 227 Feralkiwi 01-Feb-10 02:32
Otto Muck's Atlantic "Craters" 1917 Xebec 11-Feb-10 02:02
Re: I found something big.....Yeah: GOOD MUSIC!! 298 Avatar 01-Feb-10 15:05
Re: I found something big.....Yeah: GOOD MUSIC!! 276 andre.chaisson 01-Feb-10 21:06
Need Some Hard Data 354 Xebec 10-Feb-10 04:26
Re: Need Some Hard Data 269 Ahatmose 10-Feb-10 20:30


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