If you ever find yourself standing in the backyard in your pajamas at 4:00 in the morning and wondering how you got there, you may be a somnambulist — someone who walks in her sleep.
In Roman mythology, Somnus was the god of sleep; the Greeks called him Hypnos. His mother was Night (Nix) and his brother was Death (Thanatos). He lived in a dark cave and presumably never had to get up in time for school.
