Which era, characterized by the extinction of reptiles and the appearance of mammals, is considered significant in geological history?
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The end of Triassic or Mesozoic era is the time when reptiles extinct and mammals appear on land.
The significance of this era is the appearance of mammals and the re-population of planet earth which was lost and dying. It is the era of rejuvenation diversification and growth of ecological niches and also a rise for the creation of new species.
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