If you’ve ever wished you could just take a pill to become smarter, you’re not the first. Discover some of the chemicals scientists have studied for this exact purpose, including the controversial drug modafinil. But beyond drugs, explore the attempted brain hacking known as transcranial direct-current stimulation (tDCS). Could tDCS help people with neurological concerns? And what might we learn about tDCS and acquired savantism that could be related to the intelligence we all possess?