text: I know I sleep better with my head facing either north or South.  \n\nThe only time it didn't matter was when I was in the Navy sleeping on board the ship, but the steel ship kept compasses from working, so I imagine it sheilded me from the earth's magnetic field enough...  Of course I needed to slept in line with the keel when I was on ship...\n\nI don't know of any scientific evidence one way or another...