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The Guardian's blog on scientific research and controversies, written by our reporters and guest contributors.

The Talk.Origins Archive is a collection of articles and essays that explore the creationism/evolution controversy from a mainstream scientific perspective. In other words, the authors of most of the articles in this archive accept the prevailing scientific view that the earth is ancient, that there was no global flood, and that evolution is responsible for the earth's present biodiversity.

Darwin Online is the largest and most widely consulted edition of the writings of Darwin ever published. More copies of Darwin's works have been downloaded from Darwin Online than have been printed by all publishers of the past 180 years combined. It is probably the most extensive scholarly website devoted to any historical figure.

The Evolution website provides you with twenty classic texts from the history of evolutionary biology. While there has to be an arbitrary element in the choice of papers, we have aimed to include timeless classics: some of them are still the works that dominate modern discussions, others remain as implicit towering structures behind the activities of the 21st Century. All, however, are superb scientific papers, providing all sorts of intellectual pleasure for the reader.

EvoTutor is your online resource for interactive simulations of evolutionary processes.

Investigadora prediz extinção do sexo masculino dentro de 5 milhões de anos!

Biological evolution: never has a phenomenon so important so lent itself to such clear, understandable, elegant explanations. But just as evolution itself produces a seemingly infinite variety of life forms, so the human understanding of evolution has produced countless educational and entertaining kinds of illustrations by which to explain it. In the video above, astronomer-astrophysicist-cosmologist Carl Sagan, no stranger to demystifying the once seemingly unfathomable phenomena of our universe, shows how evolution actually works with eight minutes of crisp animation that take us from molecules in the primordial soup, to bacteria, to plants and polyps, to lampreys, to turtles, to dinosaurs and birds, to wombats, to baboons and apes, to us. Then he goes back and does the whole four billion-year evolutionary journey again in forty seconds...