— Hun­dreds of com­pa­nies around the globe, now includ­ing Elon Musk’s Neu­ralink and even Face­book, are research­ing and devel­op­ing new ways to help brain own­ers be smarter, sharp­er, and healthier. What explains this flur­ry of activ­i­ty? Where may it be headed? To help you under­stand what’s going on, let me high­light five key facts that emerged…