Editing Paleozoic (section)

=== Cambrian Period ===
{{main|Cambrian}}
[[File:Trilobite Heinrich Harder.jpg|thumb|left|[[Trilobite]]s]]
The Cambrian spanned from 539–485&nbsp;million years ago and is the first period of the Paleozoic Era of the Phanerozoic. The Cambrian marked a boom in evolution in an event known as the [[Cambrian explosion]] in which the largest number of creatures evolved in any single period of the history of the Earth. Creatures like [[algae]] evolved, but the most ubiquitous of that period were the armored arthropods, like trilobites. Almost all marine phyla evolved in this period. During this time, the supercontinent Pannotia begins to break up, most of which later became the supercontinent Gondwana.<ref>{{cite web |title=Cambrian |website=www.ucmp.berkeley.edu |place=Berkeley, CA |publisher=[[University of California Museum of Paleontology]] |url=http://www.ucmp.berkeley.edu/cambrian/cambrian.php |access-date=2015-04-26 |archive-date=2012-05-15 |archive-url=https://web.archive.org/web/20120515190500/http://www.ucmp.berkeley.edu/cambrian/cambrian.php |url-status=live }}</ref>
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