The pentatonic scale, which fossil evidence suggests is over 40,000 years old, is found in traditional music all over the world and remains at the heart of music we love today. Jazz, Blues, Rock, Soul, R&B, Folk, Gospel, Bluegrass and many other genres. Bone flutes have been found in China, South America, and Africa, but the flute made from a griffin bone, discovered in the the Hohle Fels cave in Germany, is the oldest known intact pitched instrument.  Tom Service, writing for the Guardian observes...