The Globe and Mail: No substitute for milk
By STEPHEN STRAUSS
Saturday, March 5, 2005 - Page F8
"One of the continuing debates in anthropology is over agriculture's effect on population growth. One line of thought argues that the arrival of agriculture triggered a population boom as a fallout of the creation of the world's first true baby food. The rationale is that when mothers were able to feed their children substances such as corn or oat gruel, the age of weaning may have fallen to as early as six months from three or four years. ...."