cambrian explosion

One of the most mysterious times in the history of Earth is that of the “Cambrian Explosion,” when in a short geologic period of time (few millions of years) most of the animal ancestors of all animals alive today (including humans) suddenly appeared. Why did the “Cambrian Explosion” happen knowing that before this event absolutely no other faunal explosions happened in billions of years of Earth’s history? It is too mysterious that all happened right at the Cambrian, and, further, if not for this event no animal we are familiar with today would exist. Watch the video posted in our week 5 module (youtube video’s URL link: and investigate and write an essay about the Cambrian Explosion. The essay must be written entirely in your OWN words. The essay must be at least three paragraphs long, and each paragraph must contain at least five sentences (you can write more than three paragraphs and more than five sentences per paragraph if you wish to do so). If needed, you can quote, but this does not count towards the last tally of number of paragraphs and sentences being required from your OWN writing. Use citations in parenthesis, APA style, if you paraphrase information from other authors (note: paraphrasing is not copying and changing a few words from other authors’ writings, it is writing it in your OWN words to explain the authors’ writings). Also, in your assignment use at least two references to investigate about this topic; use APA style and list your two references at the end of your essay.

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