Adventures in brain-hacking: how an electrical stimulator boosted my IQ

From the smart drug modafinil to oxygen chambers, interest in cognitive enhancement is growing. But can it actually make you cleverer? I tried to find out
People have always sought advantages over their rivals. But trying to improve intelligence as a way to do it has been off-limits. An education can be bought, but ability? You either had it or you didn’t. Now a new science called cognitive enhancement promises that someone who doesn’t have intelligence today could have it tomorrow.U