Answer:
This only turns over once you have traveled very far. What is it?
Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?
I am the heart that does not beat. If cut, I bleed without blood. I can fly, but have no wings. I can float, but have no fins. I can sing, but have no mouth.
It is greater than God and more evil than the devil. The poor have it, the rich need it, and if you eat it you'll die.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.
People take me on walks and I run and have fun. What am I?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?