Navigation Links
New analysis shows three human migrations out of Africa

ion years ago.

"This time frame corresponds extremely well with the fossil record, which shows Homo erectus expanding out of Africa then," Templeton said.

Another novel find is that populations of Homo erectus in Eurasia had recurrent genetic interchange with African populations 1.5 million years ago, much earlier than previously thought, and that these populations persisted instead of going extinct, which some human evolution researchers thought had occurred.The new data confirm an expansion out of Africa to 700,000 years ago that was detected in the 2002 analysis.

"Both (the 1.9 million and 700,000 year) expansions coincide with recent paleoclimatic data that indicate periods of very high rainfall in eastern Africa, making what is now the Sahara Desert a savannah," Templeton said. "That makes the timing very amenable for movements of large populations through the area. "

Templeton said that the fossil record indicates a significant change in brain size for modern humans at 700,000 years ago as well as the adaptation and expansion of a new stone tool culture first found in Africa and later at 700,000 years expanded throughout Eurasia.

"By the time you're done with this phase you can be 99 percent confident that there was recurrent genetic interchange between African and Eurasian populations," he said. "So the idea of pure, distinct races in humans does not exist. We humans don't have a tree relationship, rather a trellis. We 're intertwined."


'"/>

Source:Washington University in St. Louis


Page: 1 2

Related biology news :

1. GATA: a graphic alignment tool for comparative sequence analysis
2. Global analysis of membrane proteins
3. Doctors closer to using gene analysis to help trauma patients
4. Agilent Technologies new genome analysis technology set to accelerate Australia fight against mesothelioma
5. New miniaturised chip dramatically reduces time taken for DNA analysis
6. Researchers develop promising new gene network analysis method
7. New technique may speed DNA analysis
8. Locusts built-in surface analysis ability directs them to fly overland
9. NASA satellite data provides rapid analysis of Amazon deforestation
10. NCAR analysis shows widespread pollution from 2004 wildfires
11. Genetic analysis of cavefish reveals more about evolution
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: New analysis shows three human migrations out Africa

(Date:10/1/2014)... prairies and forests of the world can also be ... to a surprising new study led by Colorado State ... The research team analyzed 596 soil samples collected from ... diversity of below-ground life, most of which had never ... 16.2 percent of the organisms discovered in the park ...
(Date:9/30/2014)... of moorland burning is published today in the first ... of relieving tensions on both sides of the grouse ... Moorland Burning on the Ecohydrology of River basins) project ... practised predominantly to support red grouse populations for gun ... chemistry and physical properties, river water chemistry and river ...
(Date:9/30/2014)... --- Do we think of nature as something that we ... need to "preserve?" Or do we think of ourselves as ... of nature, but what about a house? , The ... also reflected in our actions, our speech and in cultural ... the University of Washington, the American Indian Center of Chicago ...
Breaking Biology News(10 mins):Microbes in Central Park soil: If they can make it there, they can make it anywhere 2Microbes in Central Park soil: If they can make it there, they can make it anywhere 3Grouse moor burning causes widespread environmental changes 2The cultural side of science communication 2
... Helsinki and Sibelius Academy, Helsinki, the neurobiological basis ... evaluated using candidate genes associated in the earlier ... data consisted of 343 family members from 19 ... and/or active amateurs. The musical aptitude was assessed ...
... In a new study published in Disease Models & ... the influence of known cancer genes on the development and ... with limited treatment options. Inside the cell, signals are ... or even die. Cancer often results when the molecules ...
... Thank parasites for making some of our immune proteins into ... genetics study that will appear in the June 8 issue ... 25). The study, conducted by a team of researchers in ... some of those genes into risk factors for intestinal disorders. ...
Cached Biology News:The neurobiology of musicality related to the intrinsic attachment behavior? 2Zebrafish provide a model for cancerous melanoma in humans 2Immune genes adapt to parasites 2
(Date:10/1/2014)... The U.S. Department of Labor has ... Edwardsville as part of the Trade Adjustment Assistance Community ... co-administered by the Department of Labor and Department of ... Thomas E. Perez and Secretary of Education Arne Duncan ... grants to nearly 270 colleges across the country. ...
(Date:9/30/2014)... in German . ... dots in a semiconductor layer. Quantum dots are small structures ... If a short laser pulse is fired at the photonic ... experiences a change in the electromagnetic field around it. This ... light by the dot. As soon as the refractive index ...
(Date:9/30/2014)... AMHERST, Mass. Using a bio-mimicking analog of ... of grass, an international research team led by ... has taken a major step in developing long-sought ... to electricity for use in electronic devices. ... UMass Amherst and others at Stanford University and ...
(Date:9/30/2014)... Shimadzu Scientific Instruments has released the DSES-1000 ... tool for measuring displacement in rubber and other ... movement distance, the DSES-1000 can measure elongations up ... 10 mm. In addition, it achieves +/- 0.2 ... within +/- 100 µm below 50-mm stroke. , ...
Breaking Biology Technology:U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 2U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 3U.S. Dept. of Labor Awards SIUE Nearly $10-Million Grant 4Ultrafast remote switching of light emission 2Blades of grass inspire advance in organic solar cells 2Blades of grass inspire advance in organic solar cells 3Shimadzu’s New Long-Travel Extensometer Increases Precision for Soft Material Testing 2
... In biological research laboratories, filtration techniques are performed to sterilize ... and separate and purify samples for processing. In most cases, ... The majority of filtration tasks ... 50 Torr (25 28Hg). A number of plastic labware ...
... , In this ... merits. A comprehensive examination of four Information Dependent Acquisition (IDA) survey ... found. A significant number of metabolites were found with each mode ... from glyburide. , Overview ...
... Purpose , ... Q TRAP LC/MS/MS system with Metabolite ID software for Phase I and ... productivity and confidence in your results. , ... Current trends in drug development are placing more emphasis on characterization of ...
Cached Biology Technology: Improving the Efficiency of Common Filtration Tasks in your Laboratory 2 Improving the Efficiency of Common Filtration Tasks in your Laboratory 3Strategies to Identify and Confirm Phase I Metabolites of Glyburide Using the 4000 Q TRAP System 2Strategies to Identify and Confirm Phase I Metabolites of Glyburide Using the 4000 Q TRAP System 3Strategies to Identify and Confirm Phase I Metabolites of Glyburide Using the 4000 Q TRAP System 4Strategies to Identify and Confirm Phase I Metabolites of Glyburide Using the 4000 Q TRAP System 5Strategies to Identify and Confirm Phase I Metabolites of Glyburide Using the 4000 Q TRAP System 6Identification of Phase I and Phase II Metabolites of Buspirone on the Q TRAP LC/MS/MS System 2Identification of Phase I and Phase II Metabolites of Buspirone on the Q TRAP LC/MS/MS System 3Identification of Phase I and Phase II Metabolites of Buspirone on the Q TRAP LC/MS/MS System 4Identification of Phase I and Phase II Metabolites of Buspirone on the Q TRAP LC/MS/MS System 5
Request Info...
Agarose-LE, 500 g. Suitable for soft agarose cloning. Nuclease-free.Gel point (1.5%): 36 1.5 C, EEO (-mr): 1200 g/cm2. Category: Nucleotides & Enzymes & Biochemicals, Ultrapure Biochemicals ....
Request Info...
Request Info...
Biology Products: