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===Silurian Period=== [[image:Sacabambaspis janvieri.jpg|200x|thumb|right|Your noble fore-bearer: a jawless Derp-Fish!(''Sacabambaspis janvieri'')]] *'''444 to 420 million years ago''' A bit of an interim period. The first plants begin to show up on land in swamps and gradually begin to turn muddy swamps and eventually dry deserts green. Atmospheric oxygen levels rise significantly, briefly triggering another ice age. Arthropods begin to crawl onto land, combing the beaches and latter nibbling on early land plants. In the sea, various forms of invertibrates would continue to dominate. That said fish diversify and some of them begin to develop jaws to bite with.
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