“The human brain is puzzling — it is curiously large given the size of our bodies, uses a tremendous amount of energy for its weight and has a bizarrely dense cerebral cortex. But: why? Neuroscientist Suzana Herculano-Houzel puts on her detective’s cap and leads us through this mystery. By making “brain soup,” she arrives at a startling conclusion.”

Filmed June 2013 at TEDGlobal 2013
Uploaded to YouTube on November 26, 2013 by TED