In addition, little was known about the role that positive selection may have played in shaping the biology of human populations as they migrated and expanded.

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Obviously there have been instances when a player has felt aggrieved and there were times in my career where I felt hard done by, but overall I believe the continuity of Australia's selection process has had a positive affect on the consistent performances of the team.

BBC: Justin Langer column

The impressive results may partly derive from positive selection.

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