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Thank you for this perspective, I don't know much about this topic. In fact I didn't know that this was a defining characteristic of a mature planet. Makes sense.So I agree that MOST of them pose no real threat, but wouldn't agree that ALL of the ones left pose no threat. The dinosaur extinction is still linked to an impact of some kind, and that was only 65 million years ago. Granted that seems like a long time, it's really not on the scale of the ~4.6 billion year lifetime of our planet. 65 million years ago the planet was still 4.6 billion years old.
well said. Awesome perspective.