When you sleep in unfamiliar surroundings, only half your brain is getting a good night's rest. The finding, reported Thursday in the journal Current Biology, helps explain why people tend to feel tired after sleeping in a new place.
https://www.npr.org/sections/health-shots/2016/04/21/474691141/half-your-brain-stands-guard-when-sleeping-in-a-new-place
https://www.npr.org/sections/health-shots/2016/04/21/474691141/half-your-brain-stands-guard-when-sleeping-in-a-new-place