Mae Keane, The Last 'Radium Girl,' Dies At 107

In the early 1920s, the hot new gadget was a wristwatch with a glow-in-the-dark dial.

"Made possible by the magic of radium!" bragged one advertisement.

And it did seem magical. Radium was the latest miracle substance — an element that glowed and fizzed, which salesmen promised could extend your life, pump up your sex drive and make women more beautiful. Doctors used it to treat everything from colds to cancer.