![]() Significant progress has been made worldwide. Over the following half-century, the development and application of new analytical techniques coupled with the groundbreaking contributions of the Precambrian Paleobiology Research Group spurred the field to its international and distinctly interdisciplinary status. It was not until the breakthrough advances of the 1950’s and the identification of modern stromatolites (1956), Precambrian phytoplankton in shales (1950’s), stromatolitic microbes in cherts (1953), and terminal-Precambrian soft-bodied animal fossils (1950’s) that the field was placed on firm footing. Walcott, glimmerings of the previously “unknown and unknowable” early fossil record came to light – but Walcott’s Precambrian finds were also discounted. At the turn of the 19th century, beginning with the discoveries of C. Given this lack of evidence and the natural rather than theological unfolding of life’s development Darwin espoused, over the following 50 years his newly minted theory was disputed. ![]() Darwin highlighted the “inexplicable” absence of evidence of life prior to the beginning of the Cambrian. Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, Los Angeles, CA, United States. ![]()
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