The scientific theory of evolution by natural selection was conceived independently by two British naturalists, Charles Darwin and Alfred Russel Wallace, in the mid-19th century as an …

Dec 31, 2025 · 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 …

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.

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 …

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

Dec 31, 2025 · 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 …

Apr 28, 2025 · Evolution explains how microscopic single-celled organisms eventually gave rise to the vibrant explosion of life we see today. It tells us how species adapt, survive, diverge, and …

Dec 2, 2025 · Evolution can be seen as a two-step process. First, hereditary variation takes place; second, selection is made of those genetic variants that will be passed on most effectively to …

How does evolution lead to the tree of life? How does evolution work? How does evolution work on a small scale? What are species anyway, and how do new ones evolve? How does …

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