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Life may have ‘trickled’ across Earth rather than exploding into existence: Oxygen levels took 100 million years to rise enough to trigger evolution

[Global] The ‘explosion’ of animal life on Earth may have taken more than 100 million years to get going, according to a new study. Continue reading Life may have ‘trickled’ across Earth rather than exploding into existence: Oxygen levels took 100 million years to rise enough to trigger evolution