Dr. Nico Dosenbach, a neurologist at Washington University School of Medicine in St. Louis, had performed countless brain scans as part of this job. He’s even scanned his own brain several times before. This time, however, was very different. Before sliding into an MRI machine whose powerful magnetic field works with radio waves and hydrogen atoms in the body to create 3D images, Dr. Dosenbach took a larger-than-usual dose of psilocybin, the active compound in magic mushrooms. “I was, like, drifting deeper into weirdness,” he recalls in an interview with NPR. “I didn’t know where I was at all….