Explore arguments for and against cloning. Includes an introduction of how cloning can be done.

An overview of Walter and Luis Alverez's theory that a large meteorite crashed into earth causing huge tidal waves, showers of ash, and an enormous dust cloud.

Describes plants and animals that lived during the Ordovician Period, where it falls in the geologic time scale, tectonic activity happening then, the climate and environment, and extinction events.

Provides an overview of the Mesozoic Era, its time frame, geological and tectonic activities, the climate, plants and animals, and extinction events towards the end of this era.

In this interactive tutorial you will explore how geologists use clues in rocks to determine the order in which rocks formed. Learn how principles of radioactivity are used to assign actual ages to rocks. Students will explore fossils...

[Free Registration/Login may be required to access all resource tools.] Covers the Mesozoic Era, the age of dinosaurs.

A profile of the extinct Great Auk is provided here by the Canadian Museum of Nature.

In this article from the 1901 textbook by William Morey, you read about the split of Rome into East and West. and the invasions of swarms of barbarians.

The original text and artwork from Birds of America by John James Audubon, an 1840 edition. Includes families of birds and an alphabetical listing of birds. A section of now-extinct birds and one of state birds have been added.

Learn all about the black, white, Indian, Javan and Sumatran rhinos. Great links and information on rhinos. This organization works to save the rhinoceros from extinction. Much of their work centers on efforts to combat poaching.

[Free Registration/Login may be required to access all resource tools.] Students will explore the factors that lead to evolution such as genetic mutation, gene drift and gene flow.

Track the migration of whooping cranes, once on the verge of extinction. Follow new crane chicks from their hatching to the day they complete their first fall migration at 5 to 6 months of age.

[Free Registration/Login Required] This nonfiction passage gives information about animals that are on the brink of extinction, including the following: bald eagle, grizzly bears, Hawaiian sea turtles, and Southern sea turtles. This...

Find out about the Yukon Horse, an extinct animal that covered much of North America at one time.

Online resource for students and teachers to see information on icebergs, fisheries, coral reefs, waves, currents and more. Provides teachers with learning activities. Has its own ask-an-expert site (Ask Dr. Bob), and provides real-time...

At some point in our lives we all become inquisitive about our origin, our familial heritage. Plenty of folks around the world study their personal genealogy. What about animals? Scientists are constantly studying the origin of present...

[Free Registration/Login may be required to access all resource tools.] Overview of the evolution of life and Darwin's theory of evolution.

[Free Registration/Login may be required to access all resource tools.] Covers the evolution of life.

Take this interactive, multiple-choice quiz over evolution, then review your score and any missed questions at the end.

Learn about how and where tigers live when you explore this resource. You can also investigate how tigers communicate with each other, enemies, friends, and humans through this site.

This site from the Canadian Museum of Nature, a natural history museum, provides short information blurbs and fun facts on over 240 different common animals categorized by type (mammals, fish, reptiles, invertebrates, amphibians,...

What is happening to the population of pygmy rabbits? This article identifies the research being done to understand what is causing the decline in rabbit populations around the world.

Looks at the geological changes, climate, and flora and fauna of the Devonian Period.

This is an Ammonoid, more commonly referred to as an Ammonite, an extinct ancestor of today's octopus, squid and nautilus.