Boys reaching puberty earlier, says study | Science | The Observer

Boys reaching puberty earlier, says study | Science | The Observer: "New report by the American Academy of Paediatrics shows that boys as young as nine are showing signs of maturity"

It is likely the result of hormones contaminated food and likely from meat. Here is a good article http://www.scientificamerican.com/article.cfm?id=food-additives-mimic-hormones and here are some facts from Cornell University http://envirocancer.cornell.edu/factsheet/diet/fs37.hormones.cfm