I would have thought that the estimated 6 impacts, if they were on this scale, all occurred before life began evolving on Earth. Such impacts apparently formed

I would have thought that the estimated 6 impacts, if they were on this scale, all occurred before life began evolving on Earth. Such impacts apparently formed the Earth-Moon system and the oceans. https://en.wikipedia.org/wiki/Impact_event#Earth_impacts https://en.wikipedia.org/wiki/Impact_event#Earth_impacts