<But perhaps there
was (is) enough seasonal variation to make somewhat of a difference. But
this
is a whole different ball of wax.>

Why would the area where our species first evolve be a different ball of
wax?  It seems what constitute "homo"
evolved in the equatorial regions.  Moving to colder climates required
modifications to the original structure to adapt
to this new way of living.  Are we saying that our ancestors that remained
in tropical area for their entire evolutionary period are significantly
different genetically than those that adapted to colder, seasonal climates?

My point is that we are all so very similar that maybe there was very little
change required to adapt to colder areas.  We ate a little less carbs and a
little more fat in winter. Most likely we supplemented carb intake with
tubers in winter since we apparently started using fire BEFORE migrating to
colder climates(If we can believe the data now available).

Do we think that people laid around eating fruit to gain large amounts of
weight in the fall? Or did they hunt large animals and eat them slowly over
periods of weeks(naturally refrigerated).  Which scenario would require the
development of a large brain? Which would provide the nutrients and the
environmental demands required for this growth?

Jeff