Evolution and species

The story of the origin of whales is one of evolution's most fascinating tales and one of the best examples scientists have of natural selection. David Quammen has suggested all these factors may have contributed, and notes Darwin's large output of books and busy family life during that time.

evolution definition biology

Darwin described natural selection as being analogous to the artificial selection practised by animal breeders, and emphasised competition between individuals; Wallace drew no comparison to selective breedingand focused on ecological pressures that kept different varieties adapted to local conditions.

But with blending inheritance, genetic variance would be rapidly lost, making evolution by natural selection implausible. To read the theory in its original form, see Darwin's book, " On the Origin of Species.

Sign Up for e-mail newsletters Get breaking science news on monster snakes and dinosaurs, aliens, spooky particles and more! All naturalists in the two English universities Oxford and Cambridge were Church of England clergymen, and science became a search for these laws.

History Shares The theory of evolution by natural selection, first formulated in Darwin's book "On the Origin of Species" inis the process by which organisms change over time as a result of changes in heritable physical or behavioral traits.

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What is evolution?