The diagrams illustrate the differences between two stone tools from different prehistoric periods, showing their front, side and back views. Overall, Tool B appears more refined and symmetrical than Tool A, suggesting a clear improvement in tool-making techniques over time, while both tools are similar in size.
Tool A, dating back 1.4 million years, has a relatively irregular and rough shape. From the front and back views, it can be seen that the edges are uneven and the surface is poorly worked, with little evidence of deliberate shaping. The side view indicates that the tool is comparatively thick, implying limited control over flaking techniques.
By contrast, Tool B, produced 0.8 million years ago, shows a more sophisticated design. Its front view is notably tear-shaped and symmetrical, while the edges appear sharper and more evenly chipped. The side view reveals that this tool is much thinner, suggesting improved precision in manufacturing. Despite these differences, both tools measure approximately 5 cm in length, indicating that advancements focused more on efficiency and craftsmanship rather than size.