"...we find from the record in the rocks that [on Earth] there have been long periods of expansion and multiplication when life flowed and abounded and varied, and hard ages when there was a great weeding out and disappearance of species, genera, and classes, and the learning of stern lessons by all that survived." H. G. Wells, The Outline of History
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"...we find from the record in the rocks that [on Earth] there have been long periods of expansion and multiplication when life flowed and abounded and varied, and hard ages when there was a great weeding out and disappearance of species, genera, and classes, and the learning of stern lessons by all that survived." H. G. Wells, The Outline of History
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