#3120: Geologic Periods

Transcript

This is one of 45 incomplete transcripts: Don't remove this notice too soon. If you can fix this issue, edit the page!

(Sourced from explainxkcd.com)

Title text:Geologists claim it's because the earlier Cenozoic used to be called the Tertiary, but that's just a ruse to hide the secret third geologic period, between the Neogene and the Quaternary, that they won't tell us about.