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The Cambrian Geological Period
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寒武纪地质时期
The fossils give scientists their first glimpse of the strange creatures that populated the seas in the early stage of what is known as the Cambrian explosion. The Cambrian geological period, from 570 million to 500 million years ago, saw the appearance of increasingly complex marine animals in a riot of shapes and anatomical designs anticipating much of life as it is today.
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