Great article.  I was struck by one phrase:  "the capacity to find an all-
important food source, underground tubers."


> While the article is on childhood, it uses examples of hunting and
> gathering societies. Note their catching fish with spears.
>
> Why Childhood Lasts, and Lasts and Lasts
> http://www.nytimes.com/2002/07/02/science/social/02CHIL.html
>
> Don.
>