Is Perpetual Motion Machine even possible?

Is there a machine that runs forever and generates its own energy? A perpetual motion machine may be the answer. 

What is a Perpetual Motion Machine?

Perpetual motion is the motion of bodies that continues forever. Thus, such a machine never stops.

The question is, are these machines possible? So, let us look at some of the criteria for its possibility.

1. No two moving parts should touch other to avoid friction and loss of perpetual energy due to heat.
2. Operation of the machine inside a vacuum to circumvent air friction.
3. No sound should be made by the machine.

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There are a lot of other laws and principles to obey. Thus, the possibility of a perpetual motion machine still remains a question.