3 min read The Cambrian period, part of the Paleozoic era, produced the most intense burst of evolution ever known ... It may be that oxygen in the atmosphere, thanks to emissions from ...

3 min read The Carboniferous period, part of the late Paleozoic era ... forests removed huge amounts of carbon dioxide from the atmosphere, leading to a surplus of oxygen. Atmospheric oxygen ...

The transition in and out of the Late Paleozoic ice age was one of the biggest climate transitions in Earth's history, a turning point in the evolution ... CO₂ was in the atmosphere when the ...