This study guide looks at Darwin's theory of evolution and natural selection. It also looks at some of the evidence supporting the theory of evolution (comparative anatomy, comparative embryology, biogeography).

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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]

Discover how Charles Darwin developed the theory of evolution through his observations in the Galapagos Islands.

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Learn about Darwin's influences that led to his discoveries of change in species over time.

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Do you ever wonder why some birds are big like ostriches and some birds are small like robins? Or why a lion has a mane while a leopard has spots? In the 19th century, an English natural scientist named Charles Darwin was also fascinated by the diversity of life on Earth. Learn more about the theory of evolution by natural selection in this learning module produced by CK-12.

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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.

Learn how Charles Darwin became one of the most influential scientists of all time with this short biographical video. [3:38]

This site clearly explains the concept of Social Darwinism, then asks students to evaluate its implications in an example. Good lesson in critical thinking and philosophy.