1. Step, if you will, into my bedroom at night. (Don’t worry, this is a PG-rated invitation.) At first, all is tranquil: My husband and I, exhausted by our day’s labors, slumber, comatose, in our double bed. But, somewhere around 2 a.m., things begin to go bump in the night. My husband’s body starts twitching,

    — 'Dreamland': Open Your Eyes To The Science Of Sleep : NPR