Deaths from falling out of bed in the USBald eagle nesting pairs in the US
It appears that somewhere in the great ledger of American misfortune, as fewer of us tumble fatally from our beds each year, the bald eagle—that improbable national symbol—has been quietly multiplying, as if engaged in some vast cosmic compensation scheme where every prevented bedside catastrophe unlocks another nest in Montana. One might begin to suspect that the universe is not merely indifferent but actively enjoys this sort of thing.
The real culprit here is almost certainly the kind of grinding, boring progress that doesn't make headlines: better mattresses, safer bed frames, more elderly people with grab rails and medical alert systems, and simultaneously—almost parenthetically—successful environmental policy that actually worked. Between 2005 and 2021, eagle pairs went from about 7,000 to 17,000, a renaissance driven partly by the banning of DDT decades earlier and better habitat protection, while bed-death prevention improved through a thousand small increments: better hip replacements keeping people mobile, hospital-grade rails in retirement homes, a general fussiness about elderly safety that accumulated like sediment. Both trends are really tracking the same thing: a society that got marginally better at keeping itself alive, one regulation and one safety bar at a time.
This is what pattern-seeking mammals like us do—we notice that two lines on a graph moved together and feel briefly as though we've glimpsed the secret machinery of existence, when really we've just watched two separate human endeavors improve at the same pace. The correlation will likely break sometime soon, and we'll never know why. That's probably fine.
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Want to learn more about why correlations like “Deaths from falling out of bed in the US” vs “Bald eagle nesting pairs in the US” don't prove causation? Read our guide to statistical thinking.