Comment on Did People Used to Look Older?parentComments−eurasiantiger4ySurprise: normal-weight people spend time sunbathing, while obese people do not.This is a great example of why correlation does not imply causation.−mensetmanusman4yNote that there are few ethical ways to prove single variable causation over long times in human studies :)
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Surprise: normal-weight people spend time sunbathing, while obese people do not.
This is a great example of why correlation does not imply causation.
Note that there are few ethical ways to prove single variable causation over long times in human studies :)