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Originally Posted by Dragon Star
I think you are talking about destroying Earth it's self, I mean just to destroy life...which is well within our reach, especially during the Cold War...
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Hardly. Multicellular life MAYBE, but even that is unlikely. We could easiley destroy ourselves, but even wiping out a single phylum, not to mention 3 entire kingdoms, has proved to be extremely difficult no matter how much destruction our planet sustains.
Earth has been through events far worse than anything we could hope to achieve, yet life has still come back. Even if we somehow managed to wipe out 90% of the multicellular species on Earth, which I find very unlikely, we would only be looking at an End Permian level event, which although it is the worst our planet has seen life still bounced back relatively quickly. The KT event alone was hundreds of times the explosive power of our entire nuclear arsenal, yet it was one of the least destructive mass extinction. It only destroyed about 50% of Earth's species. Surely a terrible event, but it came no where close to wiping out multicellular life on the planet, not to mention all life.