Convert scn to stl

What is the difference between .scn and .stl?

Description: The scn file type is a 3D scene file created by Softimage XSI, a 3D animation and creative content authoring application. It stores a 3D scene that includes objects, materials, textures, cameras, lights, and other scene elements.; Stl is the standard 3D data transmission file format mainly used for 3D printing. STL contains surface geometry descriptions of 3D objects and it uses a series of triangles to describe the surface geometry of a 3D model.