A new look at archaic human DNA by the University of Utah has come to some interesting and “revolutionary” findings but sadly what they have found doesn’t fit at all with the status quo so it’s being ignored. However, I STRONGLY suspect that what the U of U has found is closer to the TRUTH in terms of the human evolution story than what we have now!
Using a new method for analyzing DNA sequence data researchers at the University of Utah have reconstructed the early history of archaic humans and it contradicts what we believe to be so for modern humans (H. sapiens), Neanderthals, and Denisovans. One thing they discovered quickly was that Neanderthal and Denisovan populations almost went extinct but 300 generations later the Neanderthal population grew to TENS OF THOUSANDS of individuals living in segregated populations, that is, they mainly lived apart from Denisovans and modern humans.
“This hypothesis is against conventional wisdom, but IT MAKES MORE SENSE that the conventional wisdom,” said Alan Rogers who is a professor of Anthropology and lead author of the study. And indeed it does!! The conventional wisdom holds the view that Neanderthal numbers were small when modern humans came upon the scene…somewhere around 1000 individuals. But this study shows that that number grossly underestimates the Neanderthal population at the time. The team calculated that Neanderthals and Denisovans separated around 744 kya which is much earlier than conventional wisdom holds. The study also questions the conventional wisdom that Neanderthal populations only amounted to about 1000 individuals and that the REAL Neanderthal population may have numbered in the tens of thousands!! Continue Reading
It is believed that Neanderthals in the Altai Mountains (Denisova Cave) interbreed with Denisovans and a mystery species or as some call it a “ghost species” of hominin. There is also the enigma of Population Y which I’ve blogged about before. Now comes a new “ghost species.” In saliva samples researchers have found hints of a ghost species of archaic humans that may have passed on genetic material to ancestors of people living today in sub-Saharan Africa! And, this latest research adds evidence to a growing body of evidence that suggests interbreeding between different archaic human species was far more common than previously thought
It’s long been known that Neanderthals in the Altai Mountains interbred with the Denisovans and some “ghost species” of hominin but now this new evidence also suggests that humans in sub-Saharan Africa also interbred with archaic human species! It’s beginning to look like it was “sex with anything even remotely human!” was the call of the time!! We thought such interbreeding between human species was the exception but growing evidence is now suggesting just the opposite is true. In fact, it may have been the NORM rather than the exception! Continue Reading
And it is beginning to appear that it was FREQUENT and not rare!!
Archaic admixture with modern humans is believed to have take place via interbreeding between modern humans
Dali Man Skull, China
and archaic humans such as Neanderthals, Denisovans, and possibly others. And I would certainly add Homo erectus.
Neanderthal DNA accounts for between 1-4% of the Eurasian genome in modern humans. However, this admixture is uncommon or nonexistent in the genomes of Sub-Saharan Africans. In Oceanians, Southeast Asians we find Denisovan DNA admixture. In Melanesian people we find 4-6% Denisovan DNA in their genomes.
African populations have a genetic contribution from a now extinct archaic African hominin in their genomes. Fossils, especially ancient human ancestor fossils, are rare because certain conditions must be present for fossils to form. Most species that die simply rot but every now and then the conditions are right and fossils form. In African environments there is a rapid decay of fossils and this makes it very difficult to compare modern human admixture to archaic African hominins such as H. ergaster and H. habilis et al. Further, about 2% genetic material found in some Sub-Saharan African populations entered the human genome about 35-40 kya. This was added by interbreeding with archaic human species (ancient human ancestors). Evidence for this suggests that this interbreeding mostly took place in CENTRAL Africa and NOT Eastern Africa as we would expect! In terms of geologic time 35-40 kya is NOT a long time. Continue Reading
Horses in Pleistocene Park, Siberia
In northeastern Siberia near the Kolyma River south of Chersky in the Sakha Republic of Russia scientists are attempting to recreate a subarctic steppe grassland ecosystem that existed during the last ice age. Led by Dr Sergey Zimov the project aims to give support to the hypothesis that overhunting and not climate change was the main cause of wildlife extinction and the disappearance of grasslands at the end of the Pleistocene. An additional aim of the project is to research climate effects on the ecosystem with the hypothesis being that the change from tundra to grasslands will result in higher energy emissions and energy absorption in the area leading to less thawing of the permafrost and, thereby, less emission of greenhouse gases. Continue Reading
We’ve got a lot of 30-something males still living at home with mommy and daddy today. They don’t work and aren’t married and basically all they do is sit in the basement playing video games endlessly or engaging in some other recreational activity that one would expect to see a teenage boy doing. It’s as if these young men aren’t really men at all. Well….that is…mentally. They have the bodies of grown men but they have the minds of teenage boys and although they are sexually and physically mature they seem to still act like teen boys depending on their parents or grandparents (or someone else) to pay all of the bills, provide a roof over their heads, and supply massive amounts of food. This is a growing problem in America today especially among white males and although most are in their late 20s or early 30s there are growing numbers that are in their early to mid-40s!
There is a word for this “phenomena” and it is “Neoteny.” Neoteny refers to individual organisms who remain child-like even after they’ve reached sexual maturity. Although physically adults, mentally they retain their child-like mentality. These guys have the bodies of men but the minds and emotions of adolescents. “Children in adult bodies” is a good basic definition of Neoteny.
Biologically, an organism becomes sexually mature and an adult when it is capable of reproducing. When it enters into adulthood, then, the organism becomes physically mature. Human evolution has produced a variety of genetic changes in our species and one of the MOST IMPORTANT is neoteny. Humans are the most neotenic of all primates, in fact! Some have even gone so far as to characterize humans as “sexually mature fetuses.” And there are some reasons for this. For example, in most quadrupedal fetal animals the foramen magnum (where the spinal column connects to the brain) is near the center of the base of the skull as it is in modern humans. BUT, as that animal matures the foramen magnum moves to the rear of the skull. However, this doesn’t happen in modern humans! Our foramen magnum stays in the center….in the INFANT position!! Even in apes the young lose their neotenic features as they grow up and there are big changes in the way they look physically and act mentally. This is obvious in chimps, for example, as infants and the young look far different from adults. And they act far different from adults too. But, the position of the foramen magnum is not the only feature seen in modern humans that causes some researchers to characterize modern humans as “sexually mature fetuses.” Continue Reading