Plastics possible culprits in early puberty . Common chemicals cited in early puberty . Ever-younger puberty puzzles researchers . Early onset of puberty worries some experts. Plastic debris picks up ocean toxics .
Contaminants still lace some meats .
Scientists learning to keep tabs on dioxin . Dioxin named a known carcinogen . Diesel gases masculinize fetal rodents. Pregnant women warned about mercury in fish. Pesticides, not depleted uranium, linked to Gulf War illness.