A Bhil tribal hunter patiently tracks a wounded mouse deer through the jungles of central India. He’s living fully in the moment, senses wholly attuned to the job in hand - and nothing else . Virtually a planet away, his urban Indian counterpart sits at a desk tracking and answering multiple, often unrelated, emails and text messages. Unfortunately, the evolution of his very human brain hasn’t caught up with the devices he’s using. For the machines that sit on his desktop have been designed to work on multiple tracks simultaneously... And as any neuro-scientist can tell you, human brains have been designed by nature to focus on just one thing at a time. Bombarding them with streams of diverse information only slows them down. When people think they’re multitasking, they’re actually switching very fast; from one task after another. And there’s a cognitive cost to all this. For men, multitasking can drop IQ as much as 15 points, essentially turning them into the cognitiv...