Whatever its ultimate cause(s), the Cambrian explosion is a prime example of adaptive radiation.
What is the Cambrian explosion?
- The Cambrian Period, during which most of the major animal groups first emerge in the fossil record, is a significant period in the history of life on Earth.
- Because of the comparatively short time span over which this diversity of species develops, this event is frequently referred to as the Cambrian Explosion.
- The first and oldest fossilized animals were formerly believed to be found in Cambrian rocks, however these have now been discovered in the earlier Ediacaran (Vendean) layers.
- The term "Cambrian explosion," "Cambrian radiation," "Cambrian diversification," or "Biological Big Bang" refers to a period of time in the Cambrian Period, roughly 538.8 million years ago, when nearly All significant animal phyla started to appear in the fossil record.
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