The theory of evolution explains how living organisms change over time through a process called natural selection. It proposes that all species of life have descended from common ancestors and that genetic variations within populations provide the raw material for evolutionary change. Those individuals with traits better suited to their environment are more likely to survive and reproduce, passing those advantageous traits to future generations. Over many generations, this process can lead to the emergence of new species and the diversity of life observed today. The theory of evolution is supported by evidence from fossils, genetics, comparative anatomy, and other scientific fields.
