The Cambrian Explosion

And finish watching “the paleozoic era, that we know of” yt lady linsay nicole



And The Great Ordovician Biodiversity Event - ammonites n stuff

See britannica

And

Paleozoic. Find it. Paleo probably means old. Zoic, animals eh? Nah. 

UPDATE: Paleo = early : primitive : archaic

UPDATE: Zoic = animals or a geologic time. So I guess the geologic era, yeah.  

--> of, relating to, or being a (specified) geologic era

ex: Proterozoic

ex: Mesozoic

vs. 

--> having a (specified) animal mode of existence

holozoic

https://www.britannica.com/science/Paleozoic-Era

Paleozoic Era, major interval of geologic time that began 538.8 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history