I am wondering how our Out-Of-African ancestors stayed OUT of ketosis in the winter. Extra protein?
[QUOTE=MEversbergII;1179792]I am wondering how our Out-Of-African ancestors stayed OUT of ketosis in the winter. Extra protein?
Well thinking that our ancestors had cold winters might be a mistake. Out of Africa, people followed the warmth and coast line. Most people cought in bad weather either probably died or found a way to survive unill they found better conditions. People only started moving and living in more northern climates fairly recently. The Inuit for example are only about 2000 years old i believe. Northern Europeans would have been farming the entire time so they would have dairy, roots, starchs, grains, beans, dried fruit, etc.
As for ketosis during extreme times, its doubtful that anyone not able to get extremely fatty animals like whale/seals would be able to enter ketosis. Most wild game is a lot leaner then the animals we eat and they wouldnt have access to concentrated fat like we get from oils. Your probably right the protein would keep them out of ketosis. I know that raw fresh meat from muscles and liver have carbs from glycogen as well so people might get some this way.
They did follow the coast, but it's only coincidental that it was warm on the section of coastline from ethiopia to SE Asia, once they rounded the Asian continent and went north skirting the Glacial maximum on the Bering straight and then all the way down to the tip of SA 15-20kya, certainly a lot of cold weather on that journey, they adapted and populated as they went.
Don't know about the Inuit in particular, but records going back 10kya have been found inland in northern canada, earlier evidence is likely below sea level know, we know for the bulk of that period sealevels were much lower due to the glaciation.
CroMagnon man arrived in Europe some 40kya, no farming then, they lived alongside and likely in much the same way as Neanderthal man at the edge of glaciation and a generally temperate colder climate, herding and dairy may have preceded farming by 2-5ky but not by 30ky.
The interesting thing occuring now is the humanisation of the Neanderthal man and other "Archaic' humans like Denisovan man, there is clear evidence that there was DNA exchange (Interbreeding) once we left Africa, up to 4% Neanderthal in some european populations and 7% Denisovan in some Melanesean populations, the rest of Asia and Europe have varying mixes, even African populations show indications of interbreeding with a different Archaic Human population.
Aside from the very interesting prospect of Blonde haired Blue eyed Neanderthals, the majority of inherited genes identified are related to the immune system, so there are a number of questions here, a large number of neanderthal fossils easily fit within the variation of modern humans today and if we could breed with them, maybe they might have just been another race of humans and if this is true, then we need to take more note of their evolutionary history as it may play just as much of a role in who we are, even though their genetic contribution was quite small, the fact they spent between 300-500ky adapting in europe significantly multiplies the value of their contribution to our Genome.
The whole One Anatomicaly Modern Human walking out of Africa hypothesis is starting to break up and take on board some of the contradictions posed by the Multi Regional hypothesis, but that's for another day.
The Americas have been peopled for somewhere between 15,000 and 40,000 years depending on which archaeologists you believe. The Inuit are newer kids on the block.
[url=http://en.wikipedia.org/wiki/Settlement_of_the_Americas]Settlement of the Americas - Wikipedia, the free encyclopedia[/url]
Anyone interested in a scientifically founded breakdown of the fact that we did most of our evolving under climatically harsh conditions should read Nora Gedgaudas' book "Primal Body, Primal Mind."
Zach tends to talk out of orifices not intended for speech when it comes to revisionist history.
Tying to picture this Cro Magnon European guy farming. Yeahright, Zach.
Nora Gedgaudas is just another VLC pushing quack. Shes a freakin nutritional therapist.
There appears to have been multiple migrations into the America's, the first was by distinctly caucasoid and this was likely along the traditional coastal route which is under water and then later migrations were by those that had already inherited some asian features.
There is no evidence of boats, but I do wonder when you have a species that is making quite intricate tools, has needle and thread, knows how to produce glues from plant material, surely over a good 30ky hanging around water, they could swim and someone observed how things floated in the water, I suspect personally that primitive boats and rafts have been around through the majority of our period out of Africa.
An interesting find was stone tools on Crete dating back to around 170kya, even at the highest glaciation period crete was never connected by a land bridge, then there is the Issue of Australian aboriginals that were already there 50kya and the only feasable option was boats, hard to imagine an entire tribe decided to swim 10-20 k's multiple times just to see if there was any food over there.
So even with a lot of ice in NA & Canada, you can still do a lot of exploring by boat, I really don't think we give them enough credit.
And what are your credentials, Zach?
[QUOTE=Zach;1179866]Nora Gedgaudas is just another VLC pushing quack. Shes a freakin nutritional therapist.[/QUOTE]
Hence by deduction, through the use of your descriptor style, Ray Peat & Danny Roddy are Sugar Junkies.
Oh boy another carb war with Zach. :rolleyes:
[QUOTE=Zach;1179866]Nora Gedgaudas is just another VLC pushing quack. Shes a freakin nutritional therapist.[/QUOTE]She is a medical practitioner in neurofeedback. No, she's not an MD, so what? Her nutritional counseling is to help her neurologically challenged clients. And it works.
At least she can read an anthropology textbook. You might try that sometime.