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Pikaia

Pikaia was an early chordate that appeared in the Cambrian explosion.

Pikaia in "Worlds Enough, and Time" Edit



In truth, pikaia was one of several animals in an aquarium that a family of space travelers brought with them on their vacation to Earth. Despite the father's misgivings, he allowed his daughter to empty the aquarium into the oceans, thereby spurring an explosion of life.

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