Fastest-evolving human gene linked to brain boost - being-human - 16 August 2006 - New Scientist:
"There are only two changes in the 118 letters of DNA code that make up HAR1 between the genomes of chimps and chickens. But chimps and humans are 18 letter-changes apart. And those mutations occurred in just five million years, as we evolved from our shared ancestor.
“That is an incredible amount of change to have happened in a few million years,” Pollard notes."
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