Brain hacking: Hot-wired for happiness?

SusumuTonegawa

Click Here to Read: Brain hacking: Hot-wired for happiness? By Amy Ellis Nutt in The Washington Post on March 3, 2015.
Neuroscientist Susumu Tonegawa sits in his office in Wako-shi, Japan on Feb. 25. (Kosuke Okahara for The Washington Post)