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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..... 481 andre.chaisson 14-Jan-10 23:05
Re: I found something big..... 301 Ahatmose 15-Jan-10 00:14
Re: I found something big..... 306 andre.chaisson 15-Jan-10 00:57
Off topic for Ahatmose 318 Absinthujone 15-Jan-10 04:38
Re: I found something big..... 295 andre.chaisson 15-Jan-10 00:52
Re: I found something big..... 254 obsolete 15-Jan-10 01:31
Re: I found something big..... 294 andre.chaisson 15-Jan-10 01:59
Take it easy, Andre... 289 Absinthujone 15-Jan-10 03:53
Re: Take it easy, Andre... 310 Absinthujone 15-Jan-10 04:16
Re: I found something big..... 362 andre.chaisson 15-Jan-10 12:43
Re: I found something big..... 352 Absinthujone 15-Jan-10 13:45
Re: I found something big..... 240 andre.chaisson 15-Jan-10 14:05
Re: I found something big..... 310 NetWorkAngel 15-Jan-10 15:02
Re: I found something big..... 294 andre.chaisson 15-Jan-10 20:36
Re: I found something big..... 286 andre.chaisson 15-Jan-10 20:44
Re: I found something big..... 276 andre.chaisson 15-Jan-10 21:14
The Core Samples Already Exist and Hace Been Described and Published 287 Xebec 10-Feb-10 04:37
Re: I found something big..... 335 JonnyMcA 16-Jan-10 14:17
Re: I found something big..... 269 andre.chaisson 16-Jan-10 18:26
Re: I found something big..... 243 JonnyMcA 16-Jan-10 19:41
Re: I found something big..... 327 richarddullum 27-Jan-10 03:30
Re: I found something big..... 277 Essan 27-Jan-10 14:48
Re: I found something big..... 247 Green Ruby 01-Feb-10 00:30
Re: I found something big..... 262 Ahatmose 01-Feb-10 03:48
Re: I found something big..... 245 Feralkiwi 01-Feb-10 02:32
Otto Muck's Atlantic "Craters" 2002 Xebec 11-Feb-10 02:02
Re: I found something big.....Yeah: GOOD MUSIC!! 318 Avatar 01-Feb-10 15:05
Re: I found something big.....Yeah: GOOD MUSIC!! 311 andre.chaisson 01-Feb-10 21:06
Need Some Hard Data 374 Xebec 10-Feb-10 04:26
Re: Need Some Hard Data 287 Ahatmose 10-Feb-10 20:30


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