The first is the “chimp” system – so called because we share it with our hominid cousins. This part of our brain is in play when we act impulsively, without regard for the consequences.

Jon Bon Jovi didn't get to party with Michael Jackson in the '80s, but he did get to hang out with the next best thing: the King of Pop's beloved pet chimp, Bubbles. While chatting on Jimmy Kimmel ...