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Did You Know?
20 curious facts about the story of how our distant ancestors made the transition from water to land

Science at a Distance: Classification
The Science at a Distance Web site is part of a City University of New York initiative to enrich science classroom learning with educational content available at a distance, i.e., away from the classroom. The site's pages on classification explain many of the different reasons and rationales behind the classification of living things, including cladistics.

The companion Web site to the recently broadcast PBS miniseries "Evolution" offers a wide range of topical interactive features. Of particular interest is the "Change" section of the site, where you'll find an interactive timeline of pivotal evolutionary moments and an explanation of phylogenic trees.

The Talk.Origins Archive: Transitional Vertebrate Fossils FAQ
Learn more about transitional fossils, compare and contrast features of "mammal-like" early reptiles with those of mammals, and browse a list of the main findings from the vertebrate fossil record. This in-depth FAQ also offers an explanation for gaps in fossil records.

University of California at Berkeley Museum of Paleontology
A true online museum, the UC-Berkeley's Museum of Paleontology Web site offers interactive versions of many of their bricks-and-mortar exhibits. Explore the geologic time scale, consult an interactive paleontology glossary, and learn about famous paleontologists through history.

At the Water's Edge: Macroevolution and the Transformation of Life by Carl Zimmer. New York: Free Press, 1999.
Carl Zimmer, an award-winning science writer, follows a group of scientists as they attempt to solve two crucial evolutionary puzzles: how did the first fish walk on land, and how did the ancestors of whales return to the sea? Zimmer's lively account explores the difficulties scientists face as they try to answer questions about events that took place in the distant past, and he puts forth elegant explanations of their theories.

Vertebrate Paleontology by Alfred Romer. Chicago: University of Chicago Press, 1966.
The field of paleontology is changing all the time, but Alfred Romer's nearly 40-year-old volume still remains the classic text in the field. For a complete yet concise summary and theories of paleontology, consult this volume, which will appeal to both paleontology novices and seasoned enthusiasts.

Discovering Fossil Fishes by John G. Maisey et al. New York: Westview Press, 2000.
John Maisey, a curator at the American Museum of Natural History, provides a clear and thorough introduction to the evolution of fishes and their descendants over 500 million years. Maisey's book includes detailed color illustrations and photos, a large glossary, and a comprehensive explanation of cladistics.

The Book of Life: An Illustrated History of the Evolution of Life on Earth by Stephen Jay Gould, ed. New York: W.W. Norton, 2001.
An up-to-date and comprehensive guide to the history of life, from the first bacteria to Homo sapiens, written by top scientists in the field. The Book of Life includes scores of illustrations, tables, and graphs.

Special Thanks
Dr. Per E. Ahlberg, Natural History Museum, London
David Espar, NOVA
Jennifer Lorenz, NOVA
Dr. George C. Williams, State University of New York at Stony Brook

Lauren Aguirre, Executive Editor
Katie Caldwell, Associate Designer
Rick Groleau, Managing Editor
Brenden Kootsey, Senior Web Developer
Lexi Krock, Editorial Assistant
Peter Tyson, Editor in Chief
Anya Vinokour, Senior Designer

Image Credits
Missing Link Home—Photo: WGBH/NOVA and BBC/Horizon

A Brief History of Time—Images: (Precambrian period) © John Sibbick; (Cambrian period) © John Sibbick; (Ordovician period) © John Sibbick; (Silurian period) © John Sibbick; (Devonian period) © John Sibbick; (Carboniferous period) © John Sibbick; (Permian) © Douglas Henderson; (Triassic) © Douglas Henderson; (Jurassic) © John Sibbick; (Cretaceous) © John Sibbick; (Tertiary) Courtesy Department Library Services, American Museum of Natural History; (Quaternary) © Douglas Henderson

Diva of the Devonian—Photos: All, WGBH/NOVA and BBC/Horizon

Confessions of a Preparator—Photos: (1,3,5) Courtesy of Sarah Finney; (2,4) WGBH/NOVA and BBC/Horizon.

Evolution in Action—Illustrations: All, WGBH/NOVA

Compiled by Lexi Krock

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