I thought the reason for left handedness being less common might have something to do with the left arm being on the same side as the heart (could using your right arm save just a little bit of strain on your heart?). My dad (left handed) speculated that fatalities caused by left handed people using tools and machinery designed for the right handed might be the cause of the lower life span.
I thought the reason for left handedness being less common might have something to do with the left arm being on the same side as the heart (could using your right arm save just a little bit of strain on your heart?). My dad (left handed) speculated that fatalities caused by left handed people using tools and machinery designed for the right handed might be the cause of the lower life span.
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