A lot has happened in that time. Earth formed and oxygen levels rose in the foundational years of the Precambrian. The productive Paleozoic era gave rise to hard-shelled organisms, vertebrates ...
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Carbon dioxide has been regulating Earth's climate for hundreds of millions of years—new studyWhat did the Late Paleozoic climate and CO₂ look like? Our reconstruction showed that for part of this era the Earth's atmosphere sustained relatively low CO₂ (about 330 parts per million or ...
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