The REAL Reason Some Humans Have Blue Eyes (It Shouldn't Exist) | History for Sleep

In this Sleepy Time History episode, drift off as we uncover the strange science, ancient history, and hidden myths behind blue eyes. From the physics of eye color and a single genetic mutation in one mysterious ancestor, to how blue eyes spread across continents and into legends of gods and heroes, this relaxing documentary-style story turns a tiny detail of human biology into an epic saga.