Climate regulation changed with the proliferation of marine animals and terrestrial plants

Earth's climate was relatively stable for a long period of time. For three billion years, temperatures were mostly warm and carbon dioxide levels high - until a shift occurred about 400 million years ago. A new study suggests that the change at this time was accompanied by a fundamental alteration to the carbon-silicon cycle.

from Latest Science News -- ScienceDaily https://ift.tt/3z1PyNt