This particular kind of lemur is called a ring-tailed lemur. Nobody knows why it is called this and generations of scientists have been baffled by it. One day a very wise person indeed will probably work out why it is called a ring-tailed lemur. If this person is exceedingly wise, then he or she will only tell very close friends, in secret, because otherwise everybody will know it, and then nobody will realise how wise the first person to know it really was.
Douglas Adams: The Salmon of Doubt