This Science Daily article summarizes a paper in Geology pertaining to the Snowball Earth debate. The author found evidence for healthy marine ecosystems at a time when they were supposed to be completely frozen over and anoxic. The website also contains a great search engine used to other Snowball Earth articles.
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Part of the Starting Point collection. The Starting Point collection includes resources addressing the needs of faculty and graduate students designing, developing, and delivering entry-level undergraduate courses in geoscience.