In the swirling ring of asteroids between Mars and Jupiter, one space rock has attracted far more attention than any other. It's known as 16 Psyche. The metal-rich asteroid has made headlines because scientists once estimated, if mined, it could be worth way more than all the cash on Earth today. But the metal that gives 16 Psyche such an eye-popping valuation is interesting to scientists for other reasons. The dense little world can provide a window into what was happening during the earliest epoch of our Solar System. Michael Shepard, geoscientist at Bloomsburg University of Pennsylvania, has a special…