🚀 go-pugleaf

Philip Deitiker <Donevenask@worlnet.att.net> wrote in message news:<BScec.8232$K_.256725@bgtnsc05-news.ops.worldnet.att.net>...

<snip>
> In fact it may have taken a serious climate change to
> permit travel even though the corridor was open simply due to
> the complexity of the terrain in the corridor and the marginal
> climate. It is concievable that it was open during the glacials
> but simply was impassible for other reasons for non-adaptive
> bipeds.

  The trouble with that scenario is that the pre-Late-Wisconsinan
gravels, near Edmonton and elsewhere in Alberta, indicate that
there was a diverse megafaunal assemblage here until about 20 ka BP.
  The middle Wisconsinan ice margin of the LIS (Laurentide Ice Sheet)
was similar to the LIS margin about 10 ka BP.
  If the bipeds were adapted to hunting megafauna in sub-Arctic
climates at about 24 ka BP, they could get through. If they weren't
adapted to hunting megafauna in sub-Arctic climates, they couldn't.
  I seem to recall that evidence from the Old World suggests that
bipeds were adapted to hunting megafauna in sub-Arctic climates at
about that time.

Daryl Krupa