As the U.S. invests in rare earths, a mine that was broke and underwater 10 years ago is now a game-changer

There’s europium, which enhanced the color red in early television sets, and neodymium, which strengthens and miniaturizes magnets. These so-called “rare earth permanent magnets” are used in everything from high-speed rail and electric vehicles to the tiny motors that make iPhones buzz, according to Julie Klinger, a professor of environmental studies at the University of Wisconsin-Madison and a rare earths expert.