sleep deprivation hints

These days I yawn a lot more than I used to. Not because retirement bores me, but because I’m at that point in my physical maturity—that sounds better than “decrepit duffer”—when I get up way too many times a night to visit the bathroom. My yawning comes from what some sleep scientists call “sleep deprivation,” in my case a long night’s sleep broken up into four or five segments. My sleep hygieneMORE...