dr. brian russell is a carolina call psychologist and joins us now. this is the reasoning behind it.ay when you bite into a drumstick or corn on the cob, that you have to grimace. and if you grimace, it sends signals to your brain that you're going to be a little bit more aggressive. could that be true? >> okay, first of all, i can't believe that somebody goes to work every day and spends their life studying stupid stuff like this. i don't know how you get a job like that. but i put absolutely zero chicken stock in this study. people have been eating chicken wings, chicken drumsticks for millenn millennia. and i don't think it's made them any more aggressive. if you're a parent, it's fine, don't worry about it. >> this is what one of the researchers say. since biting food increases aggression and noncompliance, it may not be wise to serve young children chicken wings shortly before bedtime or to serve steak and corn on the cob in the company of dinner guests. >> it says children will be twice as aggressive -- if you buy two lottery tickets, you're twice as likely to win and you're no

brian russell a psychologist, joins us right now. why mid 20s? why can't we get a couple more years out of it, dr. russell?good news and bad news. what we know certain kinds of cells do sort of reach their peak in terms of their duplication and replication, sort of their peak development relatively early in life. when we get elderly the decline is offset by simultaneous gains and wisdom in experience. for example, few years ago, "sully" sullenberger was one of the older pilots for his airline when he successfully brought his plane down on the hudson river, probably because of all the wisdom that he had acquired with all the decades in the cockpit. so the bottom line i think is, yeah, past a certain age a guy will probably not be doing certain things like playing college football for example, because of the physical performance effects, however, if that same individual is able to, oh, i don't know, write an excellent book about jesus with some first-hand reportage into it, which is the better contribution to humanity? jenna: one of the articles put it this way, that you may be slower but you could be smarte