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Climate was cold
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The climate was cold, not suitable for organisms to live.
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Invertebrates begin to appear in the oceans.
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The temperature rises, which allows more organisms to develope.
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Trilobites start to appear on the earth. They were one of the first organisms with eyesight.
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The most fearsome predator of the time was the Anomalocaris. It fed on trilobites, worms, and mollusks.
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The plants that lived at the time were one-celled algae.
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Adaptation begins with the Wiwaxia, which developed a hard shell, scales, and spikes. However, its bellly was left unprotected, like today's porcupine.
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Pangaea continued to break up. North America and Siberia separated from the Gondwana supercontinent.
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One predator of the Cambrian age was the five eyed Opabinia, which caught its food with a flexible claw on top of its head.
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Blue-green algae and bacteria begin to develop along shorelines and lake margins.
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The sea level continued to rise from 30m to 90m.
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The first chordate was the Pikaia, which was a small creature that looked like an eel.
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The warm, shallow water of the Cambrian period resulted in lage deposits of limestone and dolomite.
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Along with the temperature drop, the sea level also dropped dramatically.
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The extinction of Cambrian age arthropods led to the fossils we find today.
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The temperature drops again, which led to mass extinction.
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