alien civilizations could have the ability to make machines capable of destroying Earth
Lol. We have the ability to make machines capable of destroying earth. It would just cost a lot of money and White man-power. A few hundred scouting drones, chose a proper big asteroid with the right properties, launch a big fucking space-tractor to push that thing up to speed/orbit, launch a few more before it hits just to make sure.
And aim that fucker at Israel, just to be sure.
I think you just need to detonate a nuke at the right spot in yellowstone for instance, and that should put an end to most forms of life on earth I think. Poking a big hole into the atmosphere on top of shitting for months if not years with a gigantic amount of dust blocking the sun
Do that in other similar areas for good measure. And I'm not even consireding the damages inflicted by the ruslting lack of maintenance of everything that would follow, starting with nuclear power plants and bsl4 facilies.
You have the cobalt nuke also https://en.wikipedia.org/wiki/Cobalt_bomb I guess a tsar bomba sized one could do the trick too.
Now to destroy the planet istelf, the whole shit, yeah it's probably going to take a more heavy handed approach. But then why would you need to do that if can "just" achieve the above already?
From an hostile space alien point of view, ideally you want to get rid of humans, now the planet itself... Why not just keep it instead? It would be a waste of everything, starting with a waste of energy/doomsday device, to blow it up while the human menace is gone or the few survivors thrown back to stone age on a toxic wasteland
Nah, it doesn't make much sense
And anyways, if they are that advanced, maybe they can do something lightyears ahead of what we can't even start to dream of. Like remotely putting every single human on this planet under total mental control through some wavelengths/signal/younameit whenever they want
I mean, if they can come to us with giant space ships while we can barely send toys on mars.... Chances are, their best gun is something we can hardly conceive
From an hostile space alien point of view, ideally you want to get rid of humans, now the planet itself... Why not just keep it instead? It would be a waste of everything, starting with a waste of energy/doomsday device, to blow it up while the human menace is gone or the few survivors thrown back to stone age on a toxic wasteland
Aside from why they would have such a need, dropping a handful of rocks of a certain mass down the gravity well at particular orbits would effectively destroy all of humanity and leave the planet perfectly fine after a few months/years. All they would need to do is hang out near Jupiter or something and claim to be our greatest allies until the rocks hit. Then wait for the dust to clear, any leftovers are easy-cleanup.
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