You have Neolithic tools, which have more of these smoother edges. The Old Stone Age, New Stone Age right over here. And by looking at all of that, you have all of these scientists, you have these anthropologists, archeologists, paleontologists who are starting to piece together prehistory. And sometimes these techniques are done together. Sometimes we have writing and we have these techniques to try to get a more complete picture. Now I wanna end with just a note of caution. Even though we have all of these techniques and we're learning more every day, our understanding of all that has happened is very, very incomplete.