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Stephen Jay Gould's book Wonderful Life, published in 1989, brought the Burgess Shale fossils to the public's attention.
Gould suggests that the extraordinary diversity of the fossils indicate that life forms at the time were much more diverse than those that survive today, and that many of the unique lineages were evolutionary experiments that became extinct.
Gould's interpretation of the diversity of Cambrian fauna relied heavily on Simon Conway Morris ' reinterpretation of Charles Walcott's original publications.
However, Conway Morris strongly disagreed with Gould's conclusions, arguing that almost all the Cambrian fauna could be classified into modern day phyla.

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