[EDIT: Yes, this is a duplicate article. My bad.]
While it hasn’t actually happened yet, plans are underfoot to capture a near-Earth asteroid and mine it for precious metals. Asteroid mining was a staple of ’50s science fiction, and now we have people putting up money to make it happen. Should it prove feasible, it will also give us more resources and stave off the catastrophes predicted by limited-resource doomsayers.