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Ethio Helix
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Ethio Helix

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Abstract
Paleoanthropologists have long argued that environmental pressures played a key role in human evolution. However, our understanding of how these pressures mediated the behavioral and biological diversity of early modern humans and their migration patterns within and out of Africa is limited by a lack of archaeological evidence associated with detailed paleoenvironmental data. Here, we present the first stable isotopic data from paleosols and fauna associated with Middle Stone Age (MSA) sites in East Africa. Late Pleistocene (∼100-45 ka, thousands of years ago) sediments on Rusinga and Mfangano Islands in eastern Lake Victoria (Kenya) preserve a taxonomically diverse, non-analog faunal community associated with MSA artifacts. We analyzed the stable carbon and oxygen isotope composition of paleosol carbonate and organic matter and fossil mammalian tooth enamel, including the first analyses for several extinct bovids such as Rusingoryx atopocranion, Damaliscus hypsodon, and an unnamed impala species. Both paleosol carbonate and organic matter data suggest that local habitats associated with human activities were primarily riverine woodland ecosystems. However, mammalian tooth enamel data indicate that most large-bodied mammals consumed a predominantly C4 diet, suggesting an extensive C4 grassland surrounding these riverine woodlands in the region at the time. These data are consistent with other lines of paleoenvironmental evidence that imply a substantially reduced Lake Victoria at this time, and demonstrate that C4 grasslands were significantly expanded into equatorial Africa compared with their present distribution, which could have facilitated dispersal of human populations and other biotic communities. Our results indicate that early populations of Homo sapiens from the Lake Victoria region exploited locally wooded and well-watered habitats within a larger grassland ecosystem.
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Ethio Helix

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New NGS study of the Y DNA
A new Y-DNA study has appeared using Next Generation Sequencing, where ~9 Mb of the Y Chromosome was sequenced for 456 samples (299 of which were new) some preliminary observations are outlined below: (1) Mutation Rate: This is the second published study to...
A new Y-DNA study has appeared using Next Generation Sequencing, where ~9 Mb of the Y Chromosome was sequenced for 456 samples (299 of which were new) some preliminary observations are outlined below: (1) Mutation Rate: Thi...
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An Israeli anthropologist, Israel Hershkovitz, claims that he and his team have found the archaeological smoking gun for the Out of Africa theory, a theory which has been genetically reinforced for the past couple of decades,...
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Ethio Helix

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SNP vs. STR YDNA TMRCA Estimation
An interesting comparison of YDNA TMRCA estimates using the SNP counting method and STRs (with both pedigree and Zhivotovsky rates as well as rho and ASD methods) can be found in a recently published study. The Y-chromosome tree bursts into leaf: 13,000 hig...
An interesting comparison of YDNA TMRCA estimates using the SNP counting method and STRs (with both pedigree and Zhivotovsky rates as well as rho and ASD methods) can be found in a recently published study. The Y-chromosom...
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Assumptions on the genesis of artistic expression in humans shattered by Indonesian find.
Hand stencils and paintings of pigs found in Indonesian caves are cause for experts to rethink the genesis of artistic expression in humans according to a new publication in nature. Archaeologists have long been puzzled by the appearance in Europe ~40–35
t...
Hand stencils and paintings of pigs found in Indonesian caves are cause for experts to rethink the genesis of artistic expression in humans according to a new publication in nature. Archaeologists have long been puzzled by...
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Ethio Helix

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East African climate pulses and early human evolution Abstract Current evidence suggests that all of the major events in hominin evolution have occurred in East Africa. Over the last two decades, there has been intensiv...
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When I did my DNA ethiohelix palestine I got some palestine admixture and wanted to know what populations of middle easterners and when the admixture took place in terms of length in time?
I was kind of shock because I dont recall anyone in the family ever mentioning that.
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Ethio Helix

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The solely STR based Y TMRCA calculator now also can accept SNP based input to compute the TMRCA of a node. Instructions and methodology can be found within the app at the link below: https://ehelix.pythonanywhere.com/init/de...
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A comparison of worldwide phonemic and genetic variation in human populations Abstract Worldwide patterns of genetic variation are driven by human demographic history. Here, we test whether this demographic history has left...
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Novel genomic signals of recent selection in an Ethiopian population Fasil Tekola-Ayele, Adebowale Adeyemo, Guanjie Chen, Elena Hailu, Abraham Aseffa, Gail Davey, Melanie J Newport and Charles N Rotimi Abstract The rece...
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I stumbled upon an interesting article in the WP that led me to a recently released brief by the US Census Bureau outlining some interesting stats on the growing demography of Africans in America. The article can be freely ...
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Mutation rate of the nuclear genome is getting a fossil calibration
The SMBE 2014 conference is showcasing a presentation where a 45,000 year old genome is being fully sequenced by Fu et al. and where the sequence will be used to calibrate, to my knowledge for the first time, the mutation rate of the nuclear genome. Previou...
The SMBE 2014 conference is showcasing a presentation where a 45,000 year old genome is being fully sequenced by Fu et al. and where the sequence will be used to calibrate, to my knowledge for the first time, the mutation rat...
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In his circles
360 people
Have him in circles
201 people
asmare tesfaw's profile photo
BioCurious's profile photo
Bint Mohammed's profile photo
Endale Asrat's profile photo
Bess Rattray's profile photo
Jason Rhian's profile photo
American Chemical Society's profile photo
World of Chemicals's profile photo
Cellular Computing's profile photo
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Population genetics focusing on Africa and Ethiopia.
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Population genetics focusing on Africa and Ethiopia.
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