Why do humans have fingernails and toenails?

All primates, including ancient ancestors of humans, had claws that supported their broad fingertips. The broad fingertips helped primates maintain a strong grip around objects. Fingernails are one of those parts of the body that, if you really think about it, don't seem to serve any real purpose. read more

There are many theories about why humans have fingernails and toenails. Most relate to human evolution, suggesting that they are related to the claws that other members of the animal kingdom have. Fingernails especially are highly useful to perform daily tasks, and toenails sometimes come in handy as well, depending on the situation. read more

As mentioned earlier, fingernails and toenails on on our limbs are quite similar to the hooves and claws found in so many other animals. Primates, including humans, have broad fingertips, and nails help them support those fingers. read more

To this day, humans sport broader fingertips than other primates. Whether fingernails are an adaptation that helps to support broad fingertips or a side effect from the loss of claws is unclear, Hawks said. Another reason for fingernails: They serve as a visual advertisement of a person's health, he said. read more