In the 6th Century B.C., seven wise men of Antiquity became known for their social and political wisdom: Thalis of Miletus, Pittacus of Mytilene, Solon of Athens, Bias of Priene, Chilon of Sparta, Periander of Corinth and Cleoboulos of Lindos.
Cleoboulos, the ruler of Lindos , boasted descendence from Hercules. He traveled widely and was well acquainted with Egyptian philosophy. He wrote poems, riddles and epigrams.
The only riddle written by him which has arrived to us is the following: The father is one and his children twelve. Each of the children has twice thirty daughters who have a different appearance: some are white others are black, some of them are immortal while others die.
The answer is: Time.
Isle of Rhodes