寒武爆发 hánwǔbàofā Cambrian explosion Definitions Defs Origin Strokes Stroke Words Sentences Sents 寒武爆发 寒武爆發 hánwǔbàofā Cambrian explosion The relatively short evolutionary event, beginning around 541 million years ago, during which most major animal phyla appeared in the fossil record
寒武爆发 寒武爆發 hánwǔbàofā Cambrian explosion The relatively short evolutionary event, beginning around 541 million years ago, during which most major animal phyla appeared in the fossil record
