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The Earth's largest phylum is Arthropoda, including centipedes, millipedes, crustaceans, and insects. The insects have shown to be a particularly successful class within the phylum. What biological characteristics have contributed to the success of insects? I'm many science fiction scenarios, post-apocalyptic Earth is mainly populated with giant insects. Why don't we see giant insects today?

250-500 words done by 12:40pm today which is about two hours from now. Cite work.