Some people are born without nails on all or some of their fingers and toes, a rare genetic condition known as anonychia. Fingernails are useful for more than just scratching-having a hard surface behind our finger pads helps us grip objects, and is one of the defining characteristics of primates.
Some people are born without nails on all or some of their fingers and toes, a rare genetic condition known as anonychia. Fingernails are useful for more than just scratching-having a hard surface behind our finger pads helps us grip objects, and is one of the defining characteristics of primates.