This Enchanted Learning website contains a very detailed and hyperlinked geologic time line. Precambrian to Quaternary Eons are broken into Eras, Periods and Epochs and pivotal events of the time are also highlighted. The timeline is nicely illustrated and appropriate for all ages. Users may also follow links to other parts of the Enchanted Learning Earth website. Full description.

The Paleobiology Database is a public resource for the scientific community. Its purpose is to provide global, collection-based occurrence and taxonomic data for marine and terrestrial animals and plants of any geological age, as well as web-based software for statistical analysis of the data. From this webpage, users can access the database and search for taxa, specific collections as well as request ... Full description.

CHRONOS (Greek: time) aims to create a dynamic, interactive and time-calibrated framework for Earth history. CHRONOS's main objective is to develop a network of databases and visualization and analytical methodologies that broadly deal with chronostratigraphy - that is, with developing a better tool (the time scale) for understanding fundamental Earth processes through time. The CHRONOS platform will ... Full description.

This website contains a set of slides that discuss the current state of understanding of the Precambrian evolution of life. Information includes rocks that support the evolutionary theories. Users can click from slide to slide or follow quick links to specific slides. Full description.

This introductory online historical geology class teaches basic scientific principles like evolution and plate tectonics and reviews Earth history from the Precambrian to the present day. The course readings are online, as well as writable worksheets. The course also asks students to present their research findings as web pages. The course stresses the methods scientists use to determine the information ... Full description.

This page describes a geologic timescale poster available for purchase. The site also contains an interesting essay: "A Galactic Orbit Model for Periodic Mass Extinction," discussing how clusters of impacts could cause periodic mass extinctions. Full description.

The Worldwide Museum of Natural History is an online natural history museum with galleries that focus on vertebrates, butterflies, minerals, and meteor impacts. This site contains a lot of useful information and nice images regarding the above subjects. Full description.

In this activity, students write an essay on the history of scientific discoveries in the field of dinosaur paleontology. The essays are then evaluated via Calibrated Peer Review. On this Starting Point page, users can access information about the exercise's learning goals, context for use, teaching notes and tips, teaching materials, assessment ideas, references and topics covered. Full description.

This role-playing exercise casts students as scientific specialists, assigned to a group either supporting or opposing the cloning of dinosaurs. There are 4-6 specialists (or groups of specialists): geneticists, ecologists, etc., on each side. Each side researches for a couple of weeks and presents its argument in class (usually a single class period for each side), and other students can ask the ... Full description.

In this activity, the authors use a series of games to help students identify and answer questions about fossils. The game grows more complex over time as the instructors add rules and phyla to identify. The game begins as a simple "spelling bee" type competition to identify fossil arthropods. Each week, a new phylum and more kinds of questions are added, along with game pieces like dice, trilobucks, ... Full description.