Natural selection and genetic modification Study Guide

Stone tools provide significant evidence for human evolution, showcasing the developing intelligence, manual dexterity, and cultural complexity of early hominins. Over millions of years, these tools evolved from simple choppers to more refined and specialised implements. This progression reflects advancements in cognitive abilities, planning, and understanding of materials. Furthermore, the context in which these tools are found offers insights into the creatures that made them. The geological layers (strata) containing the tools can be dated using various scientific methods, such as radiometric dating (e.g., potassium-argon dating for volcanic rock layers) or by examining index fossils, which allows scientists to establish a chronological sequence for tool development. The discovery of different tool types alongside skeletal remains provides a crucial link between specific hominin species and their technological capabilities, helping to reconstruct the timeline and patterns of human evolutionary history.