This shrinkage has other possible explanations, more junk food probably only explains a fraction of the variation, but hey! Wotever! We need a headline that'll get some attention! (*grumble* *grumble* about the use of the press release machine to distribute scientific findings...grrr)
Still, it's fodder for an LBO Angst Fest(ival), plus it has some stuff about other sources of malnourishment, poverty, etc., and OH MY GOD, the lack of protein that might be an issue! I'm waiting for when everyone cuts out all the fat, all the carbs and keels over from rabbit disease. =:o
http://www.guardian.co.uk/usa/story/0,12271,1185457,00.html