the.com/alertness
the thin filament between snoozing through danger and catching it mid-pounce
chemicalNorepinephrine sharpens focus by flooding the brain on demand
sleep debt17 hours awake matches the impairment of being legally drunk
caffeine trickIt blocks adenosine, the molecule begging you to rest
animal edgeDolphins sleep one brain half at a time, always watching
orienting reflexSudden sounds snap attention before you consciously notice them