Monday 20 June 2011

Cro-Magnon Neanderthalis

First modern humans protected themselves against disease after leaving Africa by 'interbreeding with Neanderthals'

Early humans 'picked up genes' which protected them

By Daily Mail Reporter

Last updated at 3:01 PM on 17th June 2011

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It might seem like a novel way to keep disease at bay.

Researchers claim that the first modern humans protected themselves against unfamiliar illnesses by interbreeding with Neanderthals.

Although it was known that homo sapiens had bred with Neanderthals after leaving Africa, a study has concluded that in doing so they picked up genes which protected them and eventually helped them to populate the planet.

The publication of the Neanderthal genome last year provided proof that modern man a
so enjoyed intimate relations with other races including the Denisovans, a species identified from a Siberian fossil.

However it had been unclear until now whether or not their sexual shenanigans had influenced their evolution.

According to New Scientist, the research was carried out by Peter Parham, from California's prestigious Stanford University, who carried out research into human leukocyte antigens (HLAs) - which are vital to the human immune system.

HLAs contain some of the most variable genes in the population - known as alleles - which allow the body to react to both established and new diseases.

And while the humans that left Africa probably only carried a small number of the HLA alleles, the research indicates they picked up new ones from the Neanderthals they interbred with as they established themselves in other parts of the world.

One such allele, known as HLA-C*0702, for example, is common among modern Europeans and Asians but is never seen in African nations - suggesting that it found its way into humans through breeding with other races.

Another, the HLA-A*11 - seen among Asians but not those of African descent was discovered by Parham in the Denisovan genome, indicating that its source was interbreeding outside of Africa.

Although the majority of the modern human genome originated in Africa, Parham found the share of HLAs acquired as a result of interbreeding to be much higher.

He told New Scientists that half of European HLA-A alleles come from other ancient races, while those figures rise to 72 per cent of the population in China and over 90per cent for those in Papua New Guinea.

Parham added that because Neanderthal and Denisovan races had lived outside Africa for over 200,000 years before encountering homo sapiens, their immune systems would have been well suited to local diseases - thus helping to protect modern humans also.

He presented his findings at a recent Royal Society discussion meeting on human evolution which took place in London

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1 comment:

Anonymous said...

Lee we must keep in mind that science is now funded and run for the convenience of the elites and as a propaganda tool and anything found that is counter to their plan is suppressed or discredited thorough their `science` media, same as mainsteme news is filtered.

we must be cautious to embrace anything that now claims to be scientific fact such as the consencious of the lie that is man made global warming and make sure EVEYTHING from all sources collaborate to back up these claims and if any scientists have been persecuted by their media and funding systems.

perhaps this is now simply propagating the claim that race mixing is good for humanity, to some degree it `can` be in a natural enviroment, hybridisation of subspecies can create a stronger new subspecies, though many of the new subspecios created from any interbreeding may well have been doomed as it help too many traits from an alien species not as suited to the enviroment, in an unatural enviroment such is mans the result could be rather less desirable as nature no longer checks and removes the failings of any cross breeding, in fact in a modern society any failor is celebrated or covered up leading to further problems and few if any benefits.

As i have said before if Neanderthals could interbreed with modern humans then Neanderthals were simply a subspecies (a race if you like same as any other race only more ancient) to an earlier ancestor.

So we have subspecies (modern races) within subspecies (homo sapiens and neanderthals) and within subspecies all defined by evolution dictated by isolation, interbreeding and enviroment.

What we may find ourselfs doing in our unatural system could be akin to the issues of dog breeding where certain breeds are created and fostered in an unatural system that could not exist outside of it, or would suffer a miserable existance outside of it's usual habitat.