Many of the world's most important and life-saving devices and techniques were often discovered purely by accident. Serendipity, timing, and luck played a part in the discovery of unintentional cures and breakthroughs: A plastic shard in an RAF pilot's eye leads to the use of plastic for the implantable lens. The inability to remove a titanium chamber from rabbit's bone leads to dental implants. Viagra was discovered by a group of chemists, working...