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<blockquote data-quote="Umbran" data-source="post: 6113937" data-attributes="member: 177">They'd be as aware... and as incapable of doing anything about it!&nbsp; The interesting part of this trick is that, if you've done your job properly, they don't know you've done it.&nbsp; They know there's an asteroid coming their way, but they don't know you put it there.But, if you want it to be fast, we can cut the time by an order of magnitude or so.&nbsp; Instead of deploying a solar sail, you slap an Orion drive on the thing.&nbsp; Use up the atomic weapons folks are so keen to use, but to greater effect.&nbsp; Of course, here the fact that you're sending a rock to kill them becomes obvious.I don't believe you need to have an extinction level event to kill the civilization, as far as being an interplanetary-power is concerned.&nbsp; I asked at the start - eliminating the civilization cheaply was the *only* consideration?The teams are irrelevant.&nbsp; You don't have the test subjects.&nbsp; You don't have a pack of Martians you can test the thing on!Oh, so now you want to develop several bio-weapons, based in non-terrestrial biology, again without test subjects?&nbsp; We are stipulated it is &quot;Earth like&quot;.&nbsp; Seas are, I think, a reasonable assumption.&nbsp; Not necessary, but reasonable.</blockquote>

[QUOTE="Umbran, post: 6113937, member: 177"] They'd be as aware... and as incapable of doing anything about it! The interesting part of this trick is that, if you've done your job properly, they don't know you've done it. They know there's an asteroid coming their way, but they don't know you put it there. But, if you want it to be fast, we can cut the time by an order of magnitude or so. Instead of deploying a solar sail, you slap an Orion drive on the thing. Use up the atomic weapons folks are so keen to use, but to greater effect. Of course, here the fact that you're sending a rock to kill them becomes obvious. I don't believe you need to have an extinction level event to kill the civilization, as far as being an interplanetary-power is concerned. I asked at the start - eliminating the civilization cheaply was the *only* consideration? The teams are irrelevant. You don't have the test subjects. You don't have a pack of Martians you can test the thing on! Oh, so now you want to develop [I]several[/I] bio-weapons, based in non-terrestrial biology, again without test subjects? We are stipulated it is "Earth like". Seas are, I think, a reasonable assumption. Not necessary, but reasonable. [/QUOTE]

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