A large conch shell brought little attention in a French museum for many years, but it is now quickly gaining attention. The shell is thought to be the oldest known seashell instrument. And it still works, producing a deep sound, like a foghorn from the distant past. The shell was found during the exploration of a cave with prehistoric wall paintings in the Pyrenees Mountains in southwestern France. It was believed to be a ceremonial drinking cup. Scientists from the University of Toulouse in France recently took a fresh look at the conch shell. They now believe it was changed thousands of years ago to serve as a wind instrument.