Click below for a PowerPoint presentation about echinoids.

 PBS Digital Studio has a YouTube channel called EONS. The first episode explores the evolution, diversity, and extinction of trilobites:  click below

Related Rock, Mineral, Fossil, and Gem Websites

See how a stone sphere is made.

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of Hernando County, Florida.

Yooperlite Video

Click below to learn about rock tumbling.

Montbrook Fossil Site Saber Tooth Cat

Topics of Interest

A detailed video about making a stone sphere