Is there any scientific reason why smoke detectors always start the chrip of doom in the middle of the night? Observation bias? A deep seeded hatred in REM sleep? Also why do they still use 9v batteries that nobody has kept around since the 90s so you have to go slowly insane as the tell tale smoke detector slowly chirps away at your very soul minute by minute as you wait for any store in the world to open since it’s New Year’s Day.