2 février 1709. Alexander Selkirk, le vrai Robinson Crusoé, est recueilli après 52 mois de solitude.

Research into mind-altering drugs is back. By Zoë Corbyn, The Chronicle Review Illustration by Scott Seymour, original images from Shutterstock You don’t have to spend much time at the six-day second international Psychedelic Science conference in downtown Oakland to learn that not all its 1,900 attendees are academic scientists, and that few are strangers to…