Cork is a type of wood that comes from the bark of the cork oak tree. It has unique physical properties that make it different from other types of wood. The main difference between cork and other types of wood is its cellular structure. Cork is made up of tiny air-filled cells that give it a spongy and flexible texture. This unique structure allows cork to be easily compressed and then return to its original shape. Additionally, cork is naturally fire-resistant and has excellent insulating properties. These unique properties make cork an ideal material for a variety of uses, including flooring, wine bottle stoppers, and insulation. Overall, the main difference between cork and other types of wood is its unique cellular structure, which gives it a spongy and flexible texture, as well as its natural fire resistance and insulating properties.