LOVE HORMONE CAN ALSO LEAD TO WAR: “Oxytocin has received much attention for boosting social bonding and cooperation, but it also appears to trigger defensive aggression against outsiders who might threaten an individual’s social group, psychologists say. That indicates the hormone has a much more complex role in social dynamics than just encouraging humans to make love and not war.”

UPDATE: Robert Crawford emails: “So the ‘brotherly love’ hormone may also be connected to violence? Why am I reminded of the movie Serenity? What did Joss Whedon know, and when did he know it?!” Beware the Reavers!