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by sp332 5179 days ago
But if all life on earth is descended from something resistant to radiation, why is most life on earth so vulnerable to it now?
2 comments

Why do we need to consume Vitamin C to avoid scruvy? Evolution abandons what is no longer necessary.
Most animals don't need to do that.
Who says anything descended from this bacterium? Maybe it's not as competitive as other bacteria in more hospitable areas.