Forget complex maths problems, logic puzzles and memorisation. The hardest thing you can try to do with your brain is to not think about something. It’s virtually impossible. But why? As New Scientist explains, it has to do with what thoughts are actually made out of.
From the “how the hell did we miss this” department comes word that the U.S. military is hard at work creating “thought helmets” for its soldiers. If fully realised, this mind-interfacing piece of gear would allow for what plebeians would call magic, and Arthur C. Clark would call basic telepathy….