Cambrian explosion

词源说明

Of unclear origin, inspired by George Gaylord Simpson's description of "explosive" evolution. The earliest known use is in a BSCS high school biology textbook written in 1961 under the direction of paleobotanist Wilson Steward.

释义（英文）

专有名词 Proper noun

(evolutionary biology) The relatively rapid appearance, during the Cambrian Period around 541 million years ago, of most major animal phyla, as demonstrated in the fossil record.

名词 Noun

(by extension) The rapid appearance of anything.