【经济学人】1 - Leaders:The next frontier

Brain-computer interfaces may change what it means to be human.
Technologies are often billed as[1] transformative.
For William Kochevar, the term is justified[2].
Mr Kochevar is paralysed[3] below the shoulders after a cycling accident, yet has managed to feed himself by his own hand.
This remarkable feat is partly thanks to electrodes[4], implanted in his right arm, which stimulate muscles.
But the real magic lies higher up.