Quote:The second study looked at how long modern mammals nurse their young. Researchers in Sweden compared the diet, brain size, and weaning times of 67 species. Humans breastfeed for 2 years on average, while chimpanzees, our closest relatives, nurse for four to five years.
They found that all the animals stopped nursing when their brains hit a certain stage of development, regardless of diet. All the meat-eaters, including ferrets, killer whales, and humans, reached that point of brain development earlier than herbivores or omnivores, the researchers found.
http://www.npr.org/blogs/thesalt/2012/04...no-dilemma
Everything I needed to know about life I learned on Dagobah.
