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  • Cambrian explosion
    Cambrian explosion
    noun
    the rapid appearance during the Cambrian Period of a large number of multicelled life forms which are the ancestors of almost all modern animal phyla.
  • Cambrian Explosion
    Cambrian Explosion
    The rapid diversification of multicellular animal life that took place around the beginning of the Cambrian Period. It resulted in the appearance of almost all modern animal phyla.

Cambrian explosion

American  

noun

  1. the rapid appearance during the Cambrian Period of a large number of multicelled life forms which are the ancestors of almost all modern animal phyla.


Cambrian Explosion Scientific  
  1. The rapid diversification of multicellular animal life that took place around the beginning of the Cambrian Period. It resulted in the appearance of almost all modern animal phyla.

  2. See Note at Burgess Shale


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The findings provide scientists with a clearer picture of the world before the Cambrian explosion and may help researchers better understand the environmental conditions that paved the way for the rise of complex animal life.

From Science Daily • May 12, 2026

Then came the Cambrian explosion, known as evolution's "big bang", roughly 540 million years ago.

From Barron's • Jan. 28, 2026

Although the species was probably not the common ancestor to all ecdysozoans, the authors note, the discovery contributes a significant addition to our understanding of the diversity of life before the so-called Cambrian explosion.

From Science Magazine • Nov. 19, 2024

Think of it as the sequel to the more famous, earlier Cambrian explosion, which saw the rapid origin of many different kinds of animal bodies and groups of living things in the seas.

From Slate • Oct. 21, 2024

After the Cambrian explosion, exquisite new adaptations followed one another with comparatively breathtaking speed.

From "Cosmos" by Carl Sagan

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