This is a myth from South-Africa that explains the mortality of man and why hares have split lips (with no particular priority).
The Moon looked down on the earth and saw humans living on it's surface. The sight of them pleased the Moon and she wanted to grant them the gift of immortality, so she could always look upon them. Therefore she asked her companion the Hare to bring a message to the people: "As I die and am born again, so will you die and be born again".
But as the Hare traveled from the Moon to the earth, it got confused about the Moon's message, and when it came to the earth it said to mankind: "As I die and am never born again, so will you die and never be born again".
After delivering this message, the Hare came back to the Moon and told her what it had told the people. The Moon got so angry with the Hare for what it had done, that she picked up an axe, threw it at the Hare and split it's lip.
Though the Hare and the Moon have made up since then, I don't know if I can forgive him that easily...