For the last forty years, population geneticists have repeatedly said that our population was never smaller than several thousand.
Could humanity have had its origin in a first pair, or did it have to come from a population of at least several thousand?
When you live with an ideology long enough, it can take root in your mind and have a lasting effect.
New research confirms the possibility of a starting point of two humans instead of thousands. Ann Gauger reports.
From back when I was a sophomore taking biochemistry, one particular event stands out in my memory, perhaps because it was such an odd thing.