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Mammoth-Mud-9609 t1_izsmler wrote

Reply to comment by EcchiOli in Do trees create less oxygen in the winter after their leaves fall off? by flubberFuck

In addition the production of oxygen by cyanobacteria led to the first great extinction event and then to the longest ice age in the history of Earth. The Huronian glaciation saw the Earth turn into a gigantic snowball for 300 million years and could have seen the end evolution of advanced life on Earth. https://youtu.be/qx5VaEaNtKo

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EcchiOli t1_izsudpd wrote

Pretty fascinating in its own right, that those microorganisms to whom we owe our oxygen supply initiated a worldscale genocide of the formerly dominating lifeforms, and almost wiped themselves in the process, hehe.

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