[Free Registration/Login may be required to access all resource tools.] Through studying the past, students will explore extinction patterns and their causes and consider ways to protect biodiversity across the globe.

"The survivals and extinctions at the close of the Cretaceous are such as might be expected to result from intensely hot winds such as would be generated by extra large meteoritic impacts." This article suggests that this theory should...

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.

[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...

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...

[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.

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,...

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

Ammonoids, more commonly referred to as Ammonites, are the extinct ancestors of today's octopus, squid and nautilus. This page shows several types.