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- Lips are about 100 times more sensitive than fingertips.
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- Lips are as unique as fingerprints.
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- Lips don’t have sweat glands, which is why they can dry so quickly.
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- Lips seem pinker than other parts of the face because the skin is much thinner and lacks melanin, so the color of blood shows through.
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- Other mammals also have lips – these bits of tissue attached to muscles are extremely important for mammal babies, who get their nutrition by sucking down their mothers’ milk.
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nHowever, we aren’t sure why other mammals don’t have such clear borders between pink lips and the surrounding skin. Or we could say that we are not sure why other mammals don’t have lips like ours – in which the soft, pink inner skin is permanently turned outward, exposed.
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- Some other species kiss – for example, chimpanzees sometimes kiss after a fight, in order to make peace.
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nAlso on this date:
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nnBirthday of U.S. President James Madison
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nPlan ahead:
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nApril holidays
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