A king once asked his wise advisor, "I understand we walk upon the Earth, but what holds the Earth up?"

The advisor replied, "Your highness, the Earth rests on the back of an elephant."

The next day the king asked, "I understand the world rests on the back of an elephant, but what holds the elephant up?"

The advisor replied, "Your highness, the elephant stands on the back of a tiger."

The following day the king asked, "I understand the elephant stands on the back of a tiger, but what holds the tiger up?"

The advisor replied, "Your highness, the tiger stands on the back of a turtle."

Before the king could ask again the advisor said, "And it's turtles all the way down."