541 million years ago, there was the Cambrian explosion. Multicellular organism diversity increased as a result of this event.
More than 500 million years ago, the Cambrian explosion took place. It was a time of rapid proliferation of many types of life on Earth and the beginning of the appearance of the majority of the major animal groupings in the fossil record.
The Cambrian epoch, which spanned roughly 542-488 million years ago, is known for having experienced the fastest emergence of new animal phyla and animal variety in Earth's history. This period, frequently referred to as the Cambrian explosion, is thought to have given rise to the majority of the animal phyla that are still extant today.
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