The Male-Warrior Hypothesis (a 2006 article): researchers find evidence that intergroup rivalry increases cooperation among men, but not among women. Of course there are individual differences. The researchers are comparing groups.
Dave Munger writes about sugar, artificial sweeteners and obesity.
The immature brain behind the distractable toddler might actually help toddlers make sense of our chaotic world. (Wray Herbert).
Co-ed college housing associated with increased binge drinking.
How many times did he say I? How many times did they say shall? Geoff Nunberg (Language Log) comments on the word-counting fad in the political blogosphere.
Is fear-insensitivity during toddlerhood a risk factor for future criminal behavior?
More risk factors: researchers say that depression is as deadly as smoking.