Young scholars research the geologic time scales and the appearance of animals and plants during these eras. They complete a chart indicating the era, period and major events.

This comprehensive page discusses the Asteroid Impact vs. Volcano-Greenhouse dinosaur extinction debate. It was written by paleontologist, professor, and scientist Dr. Dewey McLean.

[Free Registration/Login Required] An informational text about how the human brain organized past memories. A question sheet is available to help students build skills in reading comprehension.