A medical journal has just revealed that a baby in Brazil was recently born with a true human tail. While all fetuses develop tails, in the vast majority of babies, the tails completely disappear by the time the baby is born, leaving no external evidence whatsoever. However, according to DailyMail.com, there have been about 40 reported cases of babies born with "boneless" tails throughout history.
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The case of the unnamed Brazilian baby born with a tail was chronicled in the Journal of Pediatric Surgery Case Reports, which revealed that the tail was not noticed during any of the mother's prenatal appointments, though it does not discuss how many ultrasounds she had or when she had them during her pregnancy. Once the baby was born, doctors discovered the tail and ran some tests to determine whether it was posing any risk to the child.