Evolution can occur if there is genetic variation within a population. Variation comes from mutations in the genome, reshuffling of genes through sexual reproduction and migration …

Feb 6, 2026 · Evolution, theory in biology postulating that the various types of living things on Earth have their origin in other preexisting types and that the distinguishable differences are …

Oct 19, 2023 · Darwin and a scientific contemporary of his, Alfred Russel Wallace, proposed that evolution occurs because of a phenomenon called natural selection. In the theory of natural …

Evolution helps us to understand the living world around us, as well as its history. Biological evolution is not simply a matter of change over time.

1 day ago · Evolution, as related to genomics, refers to the process by which living organisms change over time through changes in the genome. Such evolutionary changes result from …

Evolution is a process of continuous branching and diversification from common trunks. This pattern of irreversible separation gives life's history its basic directionality.

Because the definition of evolution is change in the heritable characteristics of a population over generations, evolution can occur by means other than natural selection.

Feb 4, 2026 · Evolution is the process of heritable change in populations of organisms over multiple generations. Evolutionary biology is the study of this process, which can occur …

Learn all about the history of life with these resources and articles on natural selection, genetics, cell types, Charles Darwin, and more.

In recent years, the theory of evolution itself has evolved. The idea that it is entirely driven by natural selection is challenged by new discoveries in genetics, epigenetics and developmental...