It's only been within the last several generations that we really have any understanding of what even happens during sleep. The delineation of different sleep stages, like deep sleep, or like ram or rapid eye movement sleep, which are characterized by certain e g patterns. It really was only discovered, you know, itin the last 75 years a so i think for many generations, in millennium,. human beings have had a sense that sleep was important, but didn't, didn't really understand what comprised sleep. So let's talk about one of the ways that sleep has impacted me the most recently: jet lag.