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A comment on Is there a war instinct?. Parent comment

Re:Is there a war instinct? by danieltillett on Monday May 04, 2015 @07:55AM (#9485578)
A cobalt bomb will keep the background radiation level on the surface lethal for nearly 100 years.

There is no way we can yet destroy all life on earth - microbial life is too tough for that, but we could destroy all macroscopic life on the surface.

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Re:Is there a war instinct? by Retric on Monday May 04, 2015 @08:00AM (#9485595)
Excluding caves. Also, rain drastically reduces how long radiation stays in an area. And again cobalt produces Gama radiation which some things use as food.
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