Asteroids are often considered no more than dusty rock-piles, rich in metals as well as rare-earth elements making them looming targets for extraction beyond Earth.  Iridium is abundant in asteroids yet very uncommon in the Earth’s crust. There is a globally distributed layer of this element around the Earth that maps back to the Chicxulub asteroid impact that caused a mass extinction event at the Cretaceous-Paleogene boundary that led to the extinction of the dinosaurs. Hill’s miniature work Return considers the chemical and molecular exchanges between earth and space and in a gesture of reverse sample return (scientific missions and human extractive processes both take), a bead of Iridium is returned to the belly of asteroid Itokawa.