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Simplifying Science

Winning Video Games but Losing Bone Density

Why does screen time lower bone mineral density among boys but increase it among girls? This could be a good example of a study where correlation is not causation - in other words, two things seem to be related to each other but really they are not. It's sort of like saying a blue sky causes the temperature to be hot. The sky may be blue and the weather may be warm, but the two are unrelated. Almost everyone has experienced feeling freezing cold on a perfectly clear day...