'Most Beautiful Woman' By Day, Inventor By Night

At the height of her Hollywood career, actress Hedy Lamarr was known as "the most beautiful woman in the world." For most of her life, her legacy was her looks. But in the 1940s -- in an attempt to help the war effort -- she quietly invented what would become the precursor to many wireless technologies we use today, including Bluetooth, GPS, cellphone networks and more.

via 'Most Beautiful Woman' By Day, Inventor By Night : NPR