Jealousy circuit in your brain

Jealousy isn’t all bad. Without it, humans probably wouldn’t have evolved into a (mostly?) monogamous species. In 2017, Californian researchers might have discovered the brain circuit responsible for the green-eyed monster. 

Coppery Titi Monkeys (yes, they’re really called that) form iron-clad pair bonds. The scientists tried real hard to tempt bonded fe…