the.com/fretfulness
the art of suffering a catastrophe that hasn't arrived and probably never will
body costChronic worry shrinks the brain's memory hub, the hippocampus
old wordFrom Old English fretan, to devour or eat away
useless mathMost worried-about events never actually happen
sleep thiefAnxious arousal blocks the brain's slow-wave deep sleep
evolutionIt's threat-detection software running with no off switch