It is quite common for children to be born with more than five fingers or toes. Called polydactylism, this condition occurs in as many as 2 in 1000 births according to some sources, although most extra digits are removed at birth. Some people are also born with a condition known as arachnodactylism, meaning “spider fingers”. As the name suggests, these people have abnormally long fingers. Guitarists Jimi Hendrix and Chuck Berry are both purported to have been arachnodactyls.