Why it's best to wait until at least the middle of the first year to begin introducing solids, as seen in the LLL philosophy statement: "For the healthy, full-term baby, breast milk is the only food necessary until the baby shows signs of needing solids, about the middle of the first year after birth.": http://www.nytimes.
A new study on why water should not be given to small babies: http://www.reuters.com/
And another on how longer breastfeeding results in increased fruit and vegetable eating by little ones! http://msue.anr.msu.edu/news/
On Baby-Led Solids (often called Baby-Led Weaning):
On healthy food choices for babies and children:
On food preferences and growing-up babies, toddlers, and young children: