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A single finger bone found in this Siberian cave led to an amazing discovery. Early humans and Neanderthals co-existed with another humanoid species called Denisovans. And many present-day humans carry genes that prove our ancestors had children with Denisovans, too.
So what makes the Denisovans and Neanderthals separate species from early humans anyway, given that all three groups co-habitated and had children together? Green said:
Answering that question – How much DNA divergence is necessary to call something a new species? – is a very difficult one. We know there was admixture between early modern humans and a population related to the Denisovans. We can see this in the genomes of individuals from Papua New Guinea, as described in the paper. Thus, from this perspective they were similar enough to successfully mate with our ancestors. The sad, frustrating truth, though is that there is no simple answer to how much divergence must be present to call something a different species or sub-species or variety or whatever.
Regardless of whether the Denisovans were another species, or just distant cousins, they are proof that humans have not always been alone among the primates. Within the last 50 thousand years, we shared the planet with other intelligent hominids who weren’t quite human.
If we want to know what humanity might look like 50 thousand years from now, after we’ve colonized space and spent millennia evolving in dramatically different environments, we should look back to the Denisovans’ humble cave in Siberia. There, three very different types of human beings met after a long time apart. And formed a community together.
Originally posted by Kashai
A single finger bone found in this Siberian cave led to an amazing discovery. Early humans and Neanderthals co-existed with another humanoid species called Denisovans. And many present-day humans carry genes that prove our ancestors had children with Denisovans, too.
Another humanoid species co-existed with early humans and Neanderthals
Any thoughts?
Originally posted by SepticSceptic
I was ready to snort derisively and say that you are jumping to conclusions. But with what i have gathered, this is a HUGE find!! What would be better is that they find more samples. But is this really a new species, or a offshoot of neanderthals/human?
Originally posted by Kashai
Sexual contact between the various proto-humans could have resulted in a new species. Much like Horses and Donkeys, resulted in Mules. Homo-Sapient initially could have not have the ability to reproduce but, about 100 thousand years ago that could have changed.
I am suggesting of course that the effort to domesticate animals could have begun about a million or so years ago.
Homo-sapient being a result of that effort...
Any thoughts?
Originally posted by Kashai
From the context of development humans appeared on Earth 250,000 years ago. Alternatively, evolution has no real explanation for macro-evolution.
Hybrids in general offer at the very least a rational conclusion that fits in with what we comprehend with respect to evolution.
Any thoughts?edit on 27-8-2012 by Kashai because: modifed content
Originally posted by Kashai
reply to post by Noinden
The necessities of survival prior to Homo-Sapient may have resulted in the development by proto-humans of domestication and even Farming,
Ergo, Humans could have developed as a result of Hybridization
Any thoughts?
The most puzzling fact of the DNA evidence is that the variability in molecular distance between dogs and wolves seems greater than the 10,000–20,000 years assigned to domestication. Yet the process and economics of domestication by humans only emerged later in this period in any case. Based upon the molecular clock studies conducted, it would seem that dogs separated from the wolf lineage approximately 100,000 years ago. While evidence for fossil dogs lessens considerably beyond 14,000 years ago and ending 33,000 years ago, there are fossils of wolf bones in association with early humans from well beyond 100,000 years ago.[31]
Originally posted by Kashai
reply to post by Noinden
The most puzzling fact of the DNA evidence is that the variability in molecular distance between dogs and wolves seems greater than the 10,000–20,000 years assigned to domestication. Yet the process and economics of domestication by humans only emerged later in this period in any case. Based upon the molecular clock studies conducted, it would seem that dogs separated from the wolf lineage approximately 100,000 years ago. While evidence for fossil dogs lessens considerably beyond 14,000 years ago and ending 33,000 years ago, there are fossils of wolf bones in association with early humans from well beyond 100,000 years ago.[31]
Ergo proto-humans could have had something to do with domestication.
Any thoughts?