Sentences with phrase «when modern human populations»
Curiously, the researchers noted in their paper, the Denisovan population shows «a drastic decline in size at the time when the modern human population began to expand.»
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Looking at indicators of population size and density (such as the number of stone tools, animal remains, and total number of sites), he concluded that modern humans — who may have had a population of only a few thousand when they first arrived on the continent — came to outnumber the Neanderthals by a factor of ten to one.
The work began, according to Balloux, when the pair decided to combine their data sets on human populations and pathogens to see if they could determine «when Helicobacter pylori first infected humans and [if this could] shed light on when and how anatomically modern humans colonized the world.»
Although many other developments and technologies have come along to help us reproduce almost like rabbits, Laland argues that «if it were the case that humans were adapted to environments in the Pleistocene [epoch ending more than 10,000 years ago] but not the Holocene [modern era, which followed], you would expect human populations would have shrunk when they moved into urban environments.»