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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..... 428 andre.chaisson 14-Jan-10 23:05
Re: I found something big..... 279 Ahatmose 15-Jan-10 00:14
Re: I found something big..... 266 andre.chaisson 15-Jan-10 00:57
Off topic for Ahatmose 297 Absinthujone 15-Jan-10 04:38
Re: I found something big..... 257 andre.chaisson 15-Jan-10 00:52
Re: I found something big..... 236 obsolete 15-Jan-10 01:31
Re: I found something big..... 255 andre.chaisson 15-Jan-10 01:59
Take it easy, Andre... 269 Absinthujone 15-Jan-10 03:53
Re: Take it easy, Andre... 287 Absinthujone 15-Jan-10 04:16
Re: I found something big..... 324 andre.chaisson 15-Jan-10 12:43
Re: I found something big..... 332 Absinthujone 15-Jan-10 13:45
Re: I found something big..... 200 andre.chaisson 15-Jan-10 14:05
Re: I found something big..... 291 NetWorkAngel 15-Jan-10 15:02
Re: I found something big..... 253 andre.chaisson 15-Jan-10 20:36
Re: I found something big..... 247 andre.chaisson 15-Jan-10 20:44
Re: I found something big..... 237 andre.chaisson 15-Jan-10 21:14
The Core Samples Already Exist and Hace Been Described and Published 265 Xebec 10-Feb-10 04:37
Re: I found something big..... 311 JonnyMcA 16-Jan-10 14:17
Re: I found something big..... 231 andre.chaisson 16-Jan-10 18:26
Re: I found something big..... 221 JonnyMcA 16-Jan-10 19:41
Re: I found something big..... 306 richarddullum 27-Jan-10 03:30
Re: I found something big..... 255 Essan 27-Jan-10 14:48
Re: I found something big..... 225 Green Ruby 01-Feb-10 00:30
Re: I found something big..... 239 Ahatmose 01-Feb-10 03:48
Re: I found something big..... 222 Feralkiwi 01-Feb-10 02:32
Otto Muck's Atlantic "Craters" 1877 Xebec 11-Feb-10 02:02
Re: I found something big.....Yeah: GOOD MUSIC!! 294 Avatar 01-Feb-10 15:05
Re: I found something big.....Yeah: GOOD MUSIC!! 268 andre.chaisson 01-Feb-10 21:06
Need Some Hard Data 349 Xebec 10-Feb-10 04:26
Re: Need Some Hard Data 266 Ahatmose 10-Feb-10 20:30


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