Smithsonian Institution
National Museum of Natural History: Paleobiology: Geologic Time: The Oligocene
Travel through Earth's history to learn about the Oligocene time period, which is characterized by the appearance of most of the living families of mammals.
CK-12 Foundation
Ck 12: Episd: Evolution of Life
[Free Registration/Login may be required to access all resource tools.] Meet Charles Darwin and his theory of evolution and natural selection. Understand why adaptations are important.
Untamed Science
Untamed Science: Biology: Evolution: History of Life: Origins
Learn about the scientific hypotheses of the origin of life on Earth. [5:55]
Vision Learning
Visionlearning: Biology: Charles Darwin Iii: Descent With Modification
Instructional module focusing on Charles Darwin's theory of Descent with Modification. Discusses how slight changes from parent to offspring create variation and potentially create new species over time. Site also includes an interactive...
Open Curriculum
Open Curriculum: Studying the History of Life
This in-depth article illustrates the concept of geologic time, and helps the learner understand why fossils are rare.
Other
Prehistoric Planet: Rock Layers: Timeline of Life on Earth
Offers an easy to understand explanation of the earth's layers and the fossils we find in each layer. It explains how these are interpreted by scientists to represent the evolution of animal and plant life through the geological eras.
CK-12 Foundation
Ck 12: Biology: Evolution of Life
[Free Registration/Login may be required to access all resource tools.] Overview of the evolution of life and Darwin's theory of evolution.
CK-12 Foundation
Ck 12: Biology: Evolution of Life
[Free Registration/Login may be required to access all resource tools.] Covers the evolution of life.
American Museum of Natural History
American Museum of Natural History: O Logy: What Do You Know? Horses
A quick way to learn horse vocabulary. Students take an interactive quiz, check their answers, and then read why each answer is correct or incorrect.
Other
Cosmic Ancestry: Louis Pasteur
This site from Cosmic Ancestry contains an article on the achievements of Louis Pasteur, "the greatest biologist of the nineteenth century."
Other
San Francisco State University: Animal Body Plans
College-level instructor's notes on how animal body plans have changed over time through the process of evolution.