Overview

Esta investigación interactiva explica qué son las homologías, cómo reconocerlas y cómo es que evolucionan.

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Overview

Clair Patterson used radiometric dating to provide evidence that Earth (and the life on it) is ancient.
This article is located within History of Evolutionary Thought.

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Overview

This article takes a look at five examples of homology, including structural, genetic and behavioral similarities.

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Overview

This article takes a look at five examples of analogy, including similar structures in barnacles and limpets, sharks and dolphins, anteaters and echidnas, and more.

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This interactive investigation explains what homologies are, how to recognize them, and how convergent traits evolve.

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The theory of evolution is broadly accepted by scientists — and for good reason! Learn about the diverse and numerous lines of evidence that support the theory of evolution.

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Karl von Baer's work on the early developmental stages of different organisms supports the idea that different species share common ancestors.
This article is located within History of Evolutionary Thought.

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This interactive investigation delves into the amazing world of the arthropods and examines their success and their evolutionary constraints.

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This research profile follows ornithologist Kim Bostwick through the jungles of Ecuador and the halls of museums as she investigates the evolution of an exotic bird's complex mating dance.

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This research profile follows scientist Satish Pillai as he studies the evolution of HIV within infected individuals. His research uses the tools of phylogenetics to investigate vaccine development and the possibility of curing the disease.

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This research profile follows scientist Chelsea Specht as she pieces together the evolutionary history of tropical plants and their pollinators--and in the process, tries to figure out how to conserve endangered species.

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This excerpted chapter from Carl Zimmer's book, The Tangled Bank, describes how evolutionary biology informs and advances medical science. Reprinted with the permission of Roberts and Company Publishers, Inc.

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This news brief, from May 2006, reviews what is likely to be the most important fossil find of the year: Tiktaalik helps us understand how our own ancestors crawled out of the water and began to walk on dry land.

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Global warming increasingly affects many aspects of our environment, from the sea level to tropical storm strength. But that's far from the full story. This news brief from July 2006 describes how global warming has already begun to affect the evolution of several species on Earth.

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This news brief from March of 2008 describes scientists' discovery of a new mammal species, a giant elephant shrew. Though elephant shrews resemble regular shrews, recent genetic evidence suggests that elephant shrews actually sprang from a much older (and perhaps more charismatic) branch of the tree of life - the one belonging to elephants and their relatives.

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We often think of speciation as a slow process, so slow that we can't really observe it going on around us. This news brief from Febrary 2010 describes two examples which demonstrate that, at least occasionally, important steps toward speciation can be observed in less than 50 years.

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Trap-jaw ants made headlines with the record-breaking speed of their jaws and a quirky behavior: flinging themselves into the air using the power of their mandibles. This news brief from October 2006 reveals the evolutionary story behind the headlines.

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This news brief, from September 2006, reviews a recent case of evolution in action. In just 15 years, mussels have evolved in response to an invasive crab species. Find out how biologists uncovered this example of evolution on double time.

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This news brief, from December 2012, describes new research into how traffic noise affects insect populations. Several hypotheses to explain the change in grasshoppers' songs are examined.

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This news brief, from October 2012, describes new research into the evolutionary response that ocean acidification may prompt in some plankton species.

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There's more to homologies and analogies than the iconic examples (e.g., the tetrapod limb) found in every high school textbook. This article goes beyond the basics to explore the many evolutionary scenarios that result in homoplasies and the many levels at which homologies might occur.
This article appears at SpringerLink.

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Human activity has certainly affected our physical environment - but it is also changing the course of evolution. This research profile follows scientist David O. Conover as he investigates the impact of our fishing practices on fish evolution and discovers what happened to the big ones that got away.

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Eyes are something of an icon of evolution. How did such an integrated, multi-part adaptation evolve? While many different animals have complex eyes, untangling their evolutionary history reveals both remarkable diversity and surprising similarity.

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In lecture three of a four part series, evolutionary biologist David Kingsley examines the original objections to Darwin's theory and shows how modern evidence supports the theory.

This lecture is available from Howard Hughes' BioInteractive website.

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This research profile examines how the scientist Carl Bergstrom uses computer modeling to understand and control the evolution of antibiotic resistant bacteria in hospitals.

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Generalmente, pensamos en la especiación como un proceso lento. Toda la evidencia disponible sostiene la idea de que diferentes especies evolucionaron desde ancestros comunes, y sin embargo, nuevas especies no aparecen a nuestro alrededor diariamente. Para muchos biólogos, esto implica que la especiación ocurre tan lentamente que es difícil observarla en escalas de tiempo humanas. Sin embargo, nuevas investigaciones sugieren que la especiación podria ser más fácil de observar de lo que pensamos.

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