The differences are so great that they are often referred to as having fundamentally different ‘body plans’. Before about 580 mya it seems that most organisms were simple. It is like an explosion of life that appears almost instantaneously on earth. The Cambrian explosion is when many animal phyla first appeared in the fossil record. The "Cambrian Explosion" refers to the sudden appearance in the fossil record of complex animals with mineralized skeletal remains. This ‘Cambrian explosion’ is often referred to as the ‘big bang’ of evolution, because dozens of widely different organisms are said to have arisen over a very short period of time. As we said: Noting that “it is unlikely that any single causal mechanism can explain the Cambrian explosion,” and that such a complicated event likely involved the “complex interaction of abiotic and biotic processes,” Smith and Harper point to early Cambrian sea level rise as a major factor. The Cambrian Explosion: For most of the nearly 4 billion years that life has existed on Earth, evolution produced little beyond bacteria, plankton, and multi-celled algae. The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known. Hambo Explains the Cambrian “Explosion”. The Cambrian explosion describes an apparently rapid increase in the diversity of bilaterian animals around 540–515 million years ago. Probably most had evolved before then, but that was their first appearance as fossils. It lasted for about 13 - 25 million years and resulted in … A week ago we wrote The Discoveroids’ Cambrian Explosion Is Fizzling, in which we we were predicting a wild Discoveroid reaction to new research into a topic they’ve made their own — the so-called Cambrian explosion. There are exceedingly few that come before this and those that follow the Cambrian show no differences than their ancestral cousins or predecessors that follow. Cambrian explosion, the unparalleled emergence of organisms between 541 million and approximately 530 million years ago at the beginning of the Cambrian Period. The Cambrian explosion or Cambrian radiation was an event approximately in the Cambrian period when practically all major animal phyla started appearing in the fossil record. The Cambrian explosion, the evolutionary “big bang” that led to the emergence of a trove of complex life forms, was caused by multiple events, researchers argue. It happened 541 million years ago (mya). “The Cambrian ‘explosion’ of body plans is perhaps the single most striking feature of the metazoan fossil record. The Cambrian Explosion is a sudden appearance of all life as we know it. The event was characterized by the appearance of many of the major phyla (between 20 and 35) that make up modern animal life. It may represent the most important evolutionary event in the history of life on Earth. Cambrian explosion explained. 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