What sparked the Cambrian explosion? - Nature

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[yuiami]

Discussion on the cause of the Cambrian explosion. Oxygen level was already high enough. No spike in the Ediacaran/Cambrian border. But modest increase may have had just crossed a threshold for the evolution of predators.

[kazutox]

エディアカラ→カンブリアで生物を進化させた原因の研究