Who Knew?

Innovation Now

Oops, IOU? How the World's First Modern Credit Card Was Invented.

The scrappy entrepreneur who created the credit card, as legend has it, might have experienced an embarrassing situation that led to inspiration.

How an Industrial Oops Led This Gunk to Become a Stretchy Smash-Hit Toy

The surprising story of how Silly Putty accidentally sprang from a wartime dilemma.

The Greasy, Glamorous Rise of Mascara

You won't believe the grimy gunk people used to smear on their eyelashes -- and still do.

The Fasten-ating History of the Humble Zipper

In which we unzip the up-and-down origins of the little mechanical wonder that keeps your pants from falling down.