Earth Science: Geology, the Environment, and the UniverseChapter 21:
Fossils and the Rock RecordWeb Links
| UCMP Web Time Machine | | Visit this site for an interactive version of the Geologic Time Scale. You can navigate through the different eras and learn more about the rocks and fossils found in each one. What types of animals lived during the Carboniferous Period?
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http://www.ucmp.berkeley.edu/help/timeform.html
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| A Guide to the Order Trilobite | | This site gives comprehensive overview of trilobites, one of the most important index fossils around. Visit this site to learn more about these prehistoric creatures. How many different groups of trilobites existed throughout history?
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http://www.aloha.net/%7Esmgon/ordersoftrilobites.htm
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| ALH84001 Main Sample Page | | in 1996, NASA scientists found this sample of asteroid that originated from Mars, which appeared to have microscopic worm fossils in it. Since then, a heated debate has taken place over whether this is actually possible evidence for life on Mars or something else. Visit this official NASA site to learn more about these fossils. How big were these worm-like structures?
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http://www-curator.jsc.nasa.gov/curator/antmet/marsmets/alh84001/sample.htm
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