Sentences with phrase «of early human populations»

Ash Parton and colleagues fall into the second camp, writing, «The dispersal of early human populations out of Africa is dynamically linked with the changing climate and environmental conditions of Arabia.

Not exact matches

I believe that throughout most of our early human history, when our species population was still relatively small, you simply didn't see rampant homosexuality.

However, in malnourished populations motor development may be a useful predictor of subsequent human function.5 A study conducted in Denmark6 found a positive relationship between breastfeeding duration and an earlier ability to crawl and perform the «pincer grip» after adjusting for potential confounding variables.

«The initial dispersals out of Africa prior to 60,000 years ago were likely by small groups of foragers, and at least some of these early dispersals left low - level genetic traces in modern human populations.

«The morphology of the skull indicates that it is that of a modern human of African origin, bearing characteristics of early European Upper Palaeolithic populations.

While it is widely accepted that the origins of modern humans date back some 200,000 years to Africa, there has been furious debate as to which model of early Homo sapiens migration most plausibly led to the population of the planet — and the eventual extinction of Neanderthals.

While fossil records prove that some anatomically modern human groups reached the Levantine corridor (the modern Middle East) as early as 100,000 years ago, genetic testing indicates that human populations inhabiting the globe today descended from a single group that migrated from Africa only 70,000 years ago — an unexplained gap of 30,000 years.

«This means that modern humans emerged earlier than previously thought,» says Mattias Jakobsson, population geneticist at Uppsala University who headed the project together with Stone Age archaeologist Marlize Lombard at the University of Johannesburg.

Rather, they were a much more primitive hominid population, possibly Homo habilis, whose members lived in, or at least transited, Dmanisi much earlier than what our accepted chronology of human evolution indicates.

iSAFE identified identical mutations in multiple non-African populations in 5 regions associated with skin pigmentation, suggesting an early response to the onset of selection as humans migrated out of Africa.

As early as 1991, Cavalli - Sforza proposed the Human Genome Diversity Project: an effort to collect DNA samples from hundreds of populations worldwide.

While the world's human population currently grows at an average rate of 1 percent per year, earlier research has shown that long - term growth of the prehistoric human population beginning at the end of the Ice Age was just 0.04 percent annually.

Even though early human - like species were present at the same time as the ancestors of some present day great apes, the researchers found that the evolutionary history of ancestral great ape populations was far more complex than that of humans.

As early as 700 B.C., Chinese authorities were encouraging peasant farmers to move into remote regions of the plateau, citing the need to feed a large and growing population while establishing a buffer of human settlement against the threat of nomadic invaders along its northern border.

Early modern humans interbred with Neanderthals, but thanks to our bigger population evolution has purged out many of the deleterious genes we acquired this way

The site was of particular interest to population geneticist Andrea Manica of the University of Cambridge in the United Kingdom because the skeletons of five humans were found with pottery, harpoons, and the remnants of nets and mats woven from twisted blades of wild sedge grass — which some (but not all) researchers consider a rudimentary form of early agriculture.

David Wilkinson of Liverpool John Moores University and Graeme Ruxton of the University of St Andrews, both in the UK, used population estimates from the early settlement of Polynesia to model the likely success of island settlement attempts in human prehistory.

Analyzing 379 new genomes from 125 populations worldwide, the group concludes that at least 2 % of the genomes of people from Papua New Guinea comes from an early dispersal of modern humans, who left Africa perhaps 120,000 years ago.

Previous research suggests our ability to cooperate and exhibit empathy — both thought to be critical to human success — relied in part on the large brains of our hominin ancestors, relative to body size; and that selection against aggression within early human populations allowed us to thrive.

Other archeological and fossil evidence, Cooke says, suggests the earliest human populations in Jamaica were foragers who lived off of available local resources, together with some cultivation of native island and mainland plants.

«This is exciting because we now have a proven resource that could finally bring definitive answers to fundamental questions about the early movements and conditions of human populations — and new information about the importance of vitamin D for modern populations,» says McMaster anthropologist Megan Brickley, lead author of the paper and Canada Research Chair in the Bioarchaeology of Human Dishuman populations — and new information about the importance of vitamin D for modern populations,» says McMaster anthropologist Megan Brickley, lead author of the paper and Canada Research Chair in the Bioarchaeology of Human DisHuman Disease.

In contradiction to this theory is archaeological evidence to suggest early modern humans had already expanded beyond Africa by this time (22) and that the eruption of the YTT did not disturb the behavior of populations inhabiting peninsular India (12).

To capture the early spatial patterns of a newly emergent virus in swine populations prior to extensive geographical mixing, this study focused on an H1 influenza virus that was introduced twice from humans into swine around 2003.

The ability to manage mosquito population growth and associated arboviral transmission to humans requires early recognition of conditions that facilitate high mosquito population density and human biting behavior.

Treatment with AFF 1 or vehicle control was initiated in mThy1 - AS mice at age 3 mo, when early sensorimotor deficits first appear — similar to the target population for the first rollout of the human vaccine.

The earliest known population of humans outside of Africa has been found, with huge implications that could erase species from the human family tree.

As for why the percentage of Neanderthal DNA in some modern humans still appears to be so low, Kelso explained that there was selection against such genes in early modern human populations.

Studies show that the San carry some of the most divergent (oldest) Y - chromosome haplogroups, specific sub-groups of A and B, the two earliest branches on the human Y - chromosome tree, suggesting they may be descendents of a population ancestral to all modern humans.

This paper was chosen as a feature highlight because it explores one of the early questions in the field of human population genetics: the whereabouts of the expansion out of Africa that brought modern humans to colonize the rest of the world in the last ~ 60,000 years.

The adult livers of immunodeficient mice support human hematopoiesis: evidence for a hepatic mast cell population that develops early in human ontogeny.

The modern human sequences in the Altai Neanderthal appear to derive from a group of modern human ancestors from Africa that separated early from other humans, about the time present - day African populations diverged from one another, around 200,000 years ago.

A probable pre-Clovis age for Monte Verde in Chile and reports by geneticists and linguists that human populations may have migrated to the Americas as early as 35 kya seem to demand a rethinking of Pleistocene peopling models.»

«Dawn of the Planet of the Apes «centers on a growing nation of genetically evolved apes led by Caesar is threatened by a group of human survivors following the devastating virus unleashed a decade earlier that killed large part of the human population.

She was a 2014 — 2015 Julius B. Richmond Fellow, and has focused much of her research on human development, early childhood care and education, and the general well - being of families with young children, with a focus on children and families from low - income, minority, and under - served populations.

Perfect for controlling the rodent population and warning early settlers of encroaching humans or wildlife, the Aussie soon proved an invaluable housemate.

While early landscapists such as J. M. W. Turner, depicted the power of raw, unrestricted nature to overwhelm humanity, the artists featured in Landscapes after Ruskin are working in a climate of heightened anxiety, technological advancement, frequent natural disasters, and increasing human populations.

It seems to me the ecological challenges presented to the human community in these early years of Century XXI are necessary matters for discussion; however, our failure to acknowledge in open discussion «the human population factor» as a primary, driving force, one that is precipitating the ecological challenges visible on the far horizon, is making our best efforts insufficient.

Potential impacts of climate change on the transmission of Lyme disease include: 1) changes in the geographic distribution of the disease due to the increase in favorable habitat for ticks to survive off their hosts; 85 2) a lengthened transmission season due to earlier onset of higher temperatures in the spring and later onset of cold and frost; 3) higher tick densities leading to greater risk in areas where the disease is currently observed, due to milder winters and potentially larger rodent host populations; and 4) changes in human behaviors, including increased time outdoors, which may increase the risk of exposure to infected ticks.

Earlier than that, we know that human migration out of Africa and population were set back during glacials and advanced during stadials.

There are now a number of studies about tobacco and alcohol increasing spontaneous abortions but one must be careful to distinguish studies whose patient population has a confirmed pregnancy (seven weeks after last menses) from those «early pregnancy loss» studies using daily urine samples tested for human chorionic gonadotropin (hCG) to detect pregnancy via hCG rise in the second week after ovulation.

Cats on FL might have been present since the early 19th century with a small settlement established by sealers, later used to exile the remnants of the Tasmanian aboriginal human population.

«Social - emotional learning programs teach the skills that children need to succeed and thrive in life,» said Dr. Eva Oberle, an assistant professor at UBC's Human Early Learning Partnership in the school of population and public health.

«Social - emotional learning programs teach the skills that children need to succeed and thrive in life,» said Eva Oberle, an assistant professor at UBC's Human Early Learning Partnership in the school of population and public health.

Between 2000 and 2011, the provincial BC government, with the assistance and oversight of the Human Early Learning Partnership at UBC Vancouver, completed four population - based assessments of developmental health.