Mining Facility Found On Asteroid 433 Eros

Is it really a rock or could it be some sort of old mining machine?

Because the space vehicle data collected by Eros in December 1998 suggests that it could contain 20 billion kilograms of aluminum and similar amounts of rare metals on Earth, such as gold and platinum …

… it is not unlikely that such an object could be a mining machine which was used by an advanced alien civilization to extract all these precious metals.