Finches on the Galapagos Islands have evolved to exploit almost every possible niche. This diagram shows the range of food sources available on the island and the different beak shapes adapted to exploit each of them. Includes background reading materials and some discussion questions.

A complete resource including a biography, chronology, examples of Wallace's published work, quotes, and interviews.

Resource presents multiple digital formats of this literary text. You can read about the famous scientist's life in his own words, as he recalled his thoughts and actions for his children.

Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Describe how scientists developed the present-day theory of evolution
Define adaptation
Explain convergent and divergent evolution
Describe homologous and vestigial structures
Discuss misconceptions about the theory of evolution

By the end of this section, you will be able to do the following:

Define population genetics and describe how scientists use population genetics in studying population evolution
Define the Hardy-Weinberg principle and discuss its importance

In honor of Darwin's 200th birthday and the 150th anniversary of the publication of "The Origin of the Species," Cornell has put together an extensive collection of Darwin's work during the last two decades of his life.

This resource is an online companion of museum-mounted exhibition about Darwin and his revolutionary theory. It covers Darwin's upbringing, influences, and discoveries employing a rich mix of media: text, photographs, videos, sound files, primary source artifacts, and more.

This video segment from Evolution: "Darwin's Dangerous Idea," together with interviews with Daniel Dennett and James Moore, depicts Darwin struggling with publicizing his revolutionary theory. [6:34]

This group of letters is a sample of the extensive correspondence Darwin carried on with a wide group of friends and colleagues as he collected evidence to support his theory of evolution by natural selection. From Charles Darwin's Letters: A Selection 1825-1859.

An introduction to Darwin's theory of evolution with hyperlinks to other topics on evolution, including a timeline of evolutionary thought.

This video from Evolution highlights Charles Darwin's personal struggle to bring to light his theory of evolution through natural selection. [6:31]

This documentary film [02:00:00] examines Darwin's insights and discusses how new breakthroughs in science are unlocking answers to riddles that Darwin couldn't answer. (29 December 2009)

When the "Origin of Species" was published in 1859, the ambitions and scopes of science were dramatically expanding. "Origin of Species" marked the transition of biology from a prescience to a science. [4:04]

This lesson will introduce the process of natural selection. It is 2 of 5 in the series titled "Natural Selection."

The entire text of Charles Darwin's book, The Origin of Species is available on this site. This link is specifically for the chapter that discusses embryology as evidence for evolution.

In this letter written to his friend and mentor Charles Lyell less than three weeks after the publication of "On the Origin of Species", Darwin describes the reaction of the great anatomist Richard Owen to his theory. From Charles Darwin's Letters: A Selection 1825-1859.