This illustrated timeline from the Lunar and Planetary Institute provides a journey through four-and-a-half billion years of time from the birth of our solar system to its current existence today.

The Earth is 4.6 billion years old- but how can humans relate to a number so colossal, and where do we fit on the geologic timeline? Joshua Sneideman reminds us of our time and place in the universe. [3:45]

To understand how a geologic time works, students make a personal timeline and compare it to a geologic timeline.

A large timeline containing major events in the history of paleontology and biology.

This timeline is a good resource if you are looking for brief descriptions of the geologic periods. Descriptions include pictures of common organisms for each period and the range of time covered by each period.

A comprehensive timeline of events in the prehistory and history of Ohio. Hyperlinks to the multitude of specific articles about Ohio's history.

Engaging and interactive timeline with illustrations and video on the origin of the Earth takes us from the Archean Era to the Cenozoic.

This interactive site will engage students' curiosity as they learn about the various types of rocks and how they are formed. Also includes a fantastic timeline, showing the formation of rocks throughout history.

Geological eras showing the fossils found in each rock layer.

This interactive timeline reveals key geologic and biological events starting back 4.8 billion years to the present.

Describes the different periods, epochs, and stages of the Cenozoic Era and the events that took place in them. Looks at geology and tectonic plate movements, climate, flora and fauna, and the emergence of mammals as the dominant life...

Students will learn about ancient organisms as they create a timeline showing when they appeared on Earth.

Smithsonian Education presents "Fossils: Footprints Across Time." Teachers can download this teaching package that introduces students to the study of fossils. Students will discover what fossils can teach us about the Earth as it was...

Earth's magnetic poles have reversed themselves throughout its long history. Find out what scientists know about these reversals. A geologic time line shows when the reversals occurred.

Provides a detailed discussion of the Paleozoic Era and a timeline of its periods and epochs. Looks at geological and tectonic events, climate changes, flora and fauna, and a mass extinction event.

This official Yellowstone National Park Kids Website is filled with activities for children of all ages.

Investigate the Coriolis effect on the directional flow of currents by measuring linear speeds at different places on the globe. Create a timeline demonstrating geologic time.

This lesson provides a timeline of fossils while also discussing the different types, locations, and geology of various fossils. It is 2 of 6 in the series titled "Fossils."

This lesson provides a timeline of fossils while also discussing the different types, locations, and geology of various fossils. It is 4 of 6 in the series titled "Fossils."