The Human Brain Owes Its Existence to a Prehistoric Pandemic

Seven million years ago, the evolution of humans and chimpanzees suddenly split from their common ancestor. New research finds that a retroviral infection inserted viral DNA into the genome of early chimpanzees can account for the enormous increase in size and cognitive power of the human brain. Remarkably, humans and chimpanzees share 98.8 percent of…

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The Link Between IQ and Zip Code

IQ is generally considered relatively stable throughout life. This supports the belief that intelligence is largely determined by genetics. From the time IQ tests were first devised in the 1920s to the present day, differences in IQ among people with different genetic backgrounds are evident. New research does not question these facts but instead shows…

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