There it was, glinting in the sand, something catching the searing sub-Saharan sun. The half conscious, desperately thirsty British airman first thought he was hallucinating. As he staggered toward the shiny object, he prayed it was something liquid, something that would cool his parched throat. But it wasn't; as he grasped it in his hand and shook the sand away, he realized he was holding a watch. A watch! And not just a watch; soon after, when he'd been rescued and returned to England, he showed it to his superior officers and then to scientific experts. At first, no one...