Whale bone refers to the hard, dense material found in the skeletons of whales. It is primarily composed of collagen and minerals, making it strong yet lightweight. Historically, whale bone was used by humans for various purposes, including tools, art, and construction, especially before the advent of modern materials. One of the most notable uses of whale bone was in the production of whalebone corsets during the 19th century, which provided structure and support in women's fashion. Additionally, baleen, a type of whale bone, was used by some species of whales to filter food from water, showcasing its unique biological function.