New Scientist -- A gene mutation determines whether or not macaque infants make a fuss when their mothers are missing, say researchers. A similar mutation has been linked to alcoholism and drug abuse in humans. The work could explain why some children are cry babies and some are more independent, says Christina Barr, a neuroscientist at the National Institute of Alcohol Abuse and Alcoholism in Bethesda, Maryland, US, who led the study.
