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10 Vestigial Traits You Didn't Know You Had

10 Vestigial Traits You Didn't Know You Had
Let's not forget that crease between the middle of your upper lip and your nose (the philtrum), left over from the days when we had a split down the middle of our snout like rodents, cats, dogs, etc. (Why did that evolve, anyway? Reptiles don't have it...) Also, on the subject of male nipples: They are most likely vestigial in a different way than many of the other features on this list, in the sense that they aren't left over from an evolutionary event, but rather an embryological/developmental one. If you define "vestigial" in terms of development rather than evolution, the bellybutton should count too!

http://io9.com/5829687/10-vestigial-traits-you-didnt-know-you-had

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