linkedin post 2018-12-30 05:12:03

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BEYOND COMPARE. "Stephen Jay Gould in his best-selling book, Wonderful Life: The Burgess Shale and the Nature of History, noted the sudden appearance of these very distinctive types of animal, suggesting that the Cambrian explosion was a time of great experimentation never again repeated. Modern statistical analyses have not confirmed Gould’s hypothesis. Rather the animals look different and odd because they are difficult to compare with our modern fauna; living arthropods are just as different from each other as those of the Cambrian." https://lnkd.in/daSxgHq View in LinkedIn
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linkedin post 2018-12-30 05:08:53

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CARNIVAL OF THE WIERD AND WONDERFUL. "Some 13 separate phyla are represented in these faunas including some very weird animals such as Anomalocarus, Hallucigenia, Opabinia, Odontogriphus and Wiwaxia. The apparent, sudden appearance of this carnival of the animals suggested a real explosion of new body plans or perhaps the animals had just acquired skeletons and the optimum size to be detected in the fossil record." https://lnkd.in/daSxgHq View in LinkedIn
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linkedin post 2018-12-30 05:41:05

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SO ENDS this first of two weekends on the Cambrian explosion of animal body plan diversity, and its subsequent mysterious abatement. To call the abatement locked or canalized is simply to use a fancy word that is a descriptor of events, not an explanation. Did these creatures saturate geometric constraints with their genetic toolkit? There are not infinite geometries available to form and structure. For example, there are a finite number of crystal options in the natural world. Or was there another constraint operating? View in LinkedIn
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