Too much of a good thing: Early impacts delivered iron to Earth but almost wiped out life

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A recent study has found that the hazards posed by large impactors far outweighed their benefits for life on Earth.

Too much of a good thing: Early impacts delivered iron to Earth but almost wiped out life : Read more

 

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The period for the Earth-Moon system from 4.5 to 4.2 billion years ago is a very crowded stage, even zircon dates 4.28 billion years old showing microorganisms flourishing on Earth. Other reports indicate intense bombardment continued well on perhaps to 3.5 billion years ago or later. A simple question needs to be asked. How many extinction events of life on Earth took place during this period due to large impact events, and how many different times did abiogenesis need to recreate life on Earth, perhaps under different conditions and many different locations? The other parallel here is Charles Darwin postulated warm little pond for abiogenesis. Numerous lab experiments are done attempting to show how abiogenesis creates life from non-living matter. Are the lab experiments and Darwin's warm little pond including large scale impact events?