The natural world has many strange mysteries and anomalies that have not been fully explained, and one of these comes from the desolate deserts out beyond civilization. Throughout history, desert explorers have come back with tales of something very strange going on out among the dunes. Travelers and explorers would often return from their excursions across these inhospitable wastelands with tales of how the very sand itself would emanate mysterious sounds, ranging from a light squeaking or flute-like sound, to ominous roaring, rumbling, or booming noises that could be heard for miles around, and which both awed and frightened. An early account of this comes from the legendary explorer Marco Polo in the 12th century, who described the anomalous sounds as “the sounds of all kinds of musical instruments, and also of drums and the clash of arms,” and attributed them to the work of evil desert spirits, but this is far from a phenomenon relegated to the far past. Here we look at the strange mystery of the signing sands that lurk about in the wild places of the world.