They're Everywhere! "One of the major unsolved problems of geology and evolution is the occurrence of diversified, multi-cellular marine invertebrates in Lower Cambrian rocks on ALL the continents, and their absence in rocks of greater age." D. Axelrod,Science 128:7, 1958 Email this quote to a friend! Current Rating: Rate this quote: Spread The Word! Amazing! Interesting Not Bad Bad Primordial Pond-Scum! View All 5-Star Quotes