Environmental Changes
Channel: Matt Stewart
Date: 2017-04-02

I make a claim that changes in environmental conditions cause changes in population size of some species, the emergence of new species, or the extinction of other species. 
To support this claim, we review the difference between correlation and causation. We review the correlation between mass extinction events in earth's history and subsequent changes in species compositions, with changes to environmental conditions. We then argue that through evidence described by natural selection, the two variables show a cause and effect relationship. 

Yes, I see my misspelling. 

Outro music:
A Better Beginning by John Paesano 
https://youtu.be/5wyxiLL5yNQ