Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Cambrian Period
Table of Contents
References & Edit History Related Topics
Images
Cambrian paleogeography geologic time Cambrian paleogeography trilobite trilobite Anomalocaris canadensis breccia Cambrian Period in geologic time trilobite fossil Geochronology. Table 5: Subdivisions of the Cambrian System.
For Students
Cambrian Period summary
Read Next
4:045 Dinosaurs: Monsters of the Past, Tyrannosaur, Trachodon, Triceratops
A Journey Through Time Since the Precambrian
Discover
The United States Supreme Court building, Washington, D.C.
14 Questions About Government in the United States Answered
Alpaca and Llama side by side
What’s the Difference Between Llamas and Alpacas?
Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere
Why Do Some Cicadas Appear Only Every 17 Years?
Illustration for Demystified "How Dangerous is Quicksand"
How Deadly Is Quicksand?
Secret Service Agent Listens To Earpiece
Secret Service Code Names of 11 U.S. Presidents
Internet http://www blue screen. Hompepage blog 2009, history and society, media news television, crowd opinion protest, In the News 2009, breaking news
Who Invented the Internet?
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”

Cambrian Period: Related Content

verifiedCite
While every effort has been made to follow citation style rules, there may be some discrepancies. Please refer to the appropriate style manual or other sources if you have any questions.
Select Citation Style
Share
Share to social media
URL
https://www.britannica.com/facts/Cambrian-Period
Written and fact-checked by
The Information Architects of Encyclopaedia Britannica

The Information Architects maintain a master list of the topics included in the corpus of  Encyclopædia Britannica, and create and manage the relationships between them.
The Information Architects of Encyclopaedia Britannica

News •

Paleontologists discover a 500-million-year-old, 3-eyed predator • May 18, 2025, 6:27 AM ET (NPR)

Photos

Cambrian paleogeography
geologic time
Cambrian paleogeography
trilobite
trilobite
Anomalocaris canadensis
breccia
Cambrian Period in geologic time
trilobite fossil
Geochronology. Table 5: Subdivisions of the Cambrian System.
See All Images →

Related Topics and References

Topics

Key People

Sedgwick, Adam
Adam Sedgwick
British geologist