A leather mask that clamps the mouth shut. A cannonball sewn into a soldier’s uniform. A machine that delivers sudden electrical pulses. These were all treatments for a problem that has haunted humanity for millennia: snoring. It might seem harmless, but snoring can be a sign of something more dangerous. So, what exactly causes snoring? Alayna Vaughan digs into the troublesome sleep disorder. Lesson by Alayna Vaughan, directed by Rémi Cans, Boniato Studio.