The Flavored Coffee Guy wrote:

Perpetual Motion, is like a rubics cube that has never been solved.
Every single scientist who has approached it, denies it.  Every single
scientist, that has attempted to solve the problem and produce a system
that operates over unity, has labeled it impossible.  In spite of how
some people seem to believe that the Universe is broken, although, it
continues with closed environmental systems deep in caves, ecosystems
that require no light, and rely completely on chemosynthesis, they
still insist that the Universe, cannot support perpetual motion.
Although, it may require billions of years for the moon to finally fall
to the Earth, they have all given up on the math.  They throw down the
puzzle, just like the rubics cube so many recollect having been thrown
before.

The Moon is moving further away from earth.

Bob Kolker