The theory of evolution is a scientific theory that explains how species on Earth have changed over time through the process of natural selection. According to the theory, all species have a common ancestor and have evolved into different forms over millions of years in response to changes in their environment. Evolution occurs through the accumulation of genetic variations in populations, which are then passed on to successive generations through reproduction. Those individuals with advantageous traits that help them survive and reproduce are more likely to pass on their genes, leading to the gradual adaptation of species to their environment. This process is known as natural selection. The theory of evolution is supported by a wealth of evidence from various scientific disciplines, including genetics, paleontology, and comparative anatomy.
