You Have Plenty Of Useless Body Parts
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Key Facts In This Video
At certain stages of development, human embryos have "tails" that are eventually absorbed and fused into vertebrae. 00:27
Some scientists believe that the plica semilunaris is a remnant of a third eyelid. 01:52
Around 37% of babies can support their entire body weight by grasping onto something. 02:23
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