From useless wisdom teeth to painful spines, the human body is filled with evidence that evolution is not always kind or helpful. For example, our bony, flexible feet —which originally evolved to help cling to branches— can lead to common, frequent foot injuries today. Meanwhile, since we walk upright, gravity pulls on our exposed testicles and can lead to a potentially excruciating condition called an inguinal hernia.
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6 Ways Evolution Screwed Us Over