A detailed biography of Alfred Russel Wallace, known especially for his theoretical work on evolution, which was published prior to Charles Darwin's own theory. Questions are posed throughout about the nature of scientific research.

This provides access to a webbook about How Humans Evolved. The following topics are covered: (1) How Evolution Works, (2) Primate Behavior and Ecology, (3) The History of Human Lineage, and (4) Evolution and Modern Humans. Each chapter...

Explore the work of Charles Darwin and the theory of evolution. This comprehensive resource includes information about Darwin's life in addition to the process of species evolution.

This online chapter of a book studying biodiversity and conservation explores the evolution of mammals, from the extinction of the dinosaurs to the evolution of humans.

Understanding Evolution provides evidence for evolution using fossils. There are also links to lesson plans.

Through fossils scientists have been able to study the evolution of whales. Read this article to take a closer look at the details.

Presents a table showing the timeline of theories of evolution, a description of Darwin's theory of evolution, and a list of arguments attacking the concept of evolution.

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

Explore the scientific ideas that paved the way for Charles Darwin's theory of natural selection. Map and research his scientific journeys and explain how his theory changed the course of science and the world.

This site has the complete text of Charlies Darwin's "Descent of Man."

Museum site note on the history of evolutionary thought and includes scientists and thinkers who have contributed to our understanding of life on Earth. Links are provided for da Vinci, Linneaues, Erasmus Darwin, and others.

Laurence Moran discusses one of the most important mechanisms of evolution, Random Genetic Drift.

Find out what types of animals Charles Darwin saw when he visited the Galapagos Islands. A slide show of animals and explanations for their evolution are also featured on this site.

Complete a hands-on lab simulation of natural selection to learn how it impacts a breeding population. Perform an online laboratory simulation and examine the interplay between natural and sexual selection in a population.

The HMS Beagle is the ship Charles Darwin sailed an his journey to study life science.

A brief description of Charles Lyell and his work "The Principles of Geology" which includes the concept of uniformitarianism. A description of his views on evolution and a comparison to Charles Darwin.

This graphic from Ecology and Evolution of Darwin's Finches by Peter Grant presents data from the Galapagos Islands, showing that a severe drought put selective pressure on the population of Darwin's finches and resulted in a change in...

What is evolution? What is natural selection? How has our understanding of evolution changed since Darwin's day? You will find the answers to these questions and more in this basic explanation of the evolutionary process.

Using diagrams and descriptive illustrations, this college-level biology reference book discusses the development of evolutionary theory.

Interactive animation illustrates how Charles Darwin used his study of finch beaks to explain evolution. A phylogenetic tree diagram shows how the birds' color and beak shape changed over generations.

This video segment from Evolution: "Darwin's Dangerous Idea" shows biologists Chris Schneider and Tom Smith studying hummingbirds and other animals in Ecuador. Their research is investigating the processes by which new species are formed.

Scientific article explaining what natural selection is, and how it manifests itself through genetics and from generation to generation. Natural selection is compared to genetic drift, both of which cause evolution to occur. The limits...

Scientists can still be surprised! The genetic ingredients that assemble us are similar to those that assemble a fly. NOVA explains the emerging science of evolution developmental biology. This is the science that studies genes at the...

In this text excerpted from Chapter 3, "Struggle for Existence," of Charles Darwin's "On the Origin of Species," Darwin draws on firsthand and historical information for his observations about evolution.