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For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.

-1 votes

How can I explain why my mechs don't sink into the ground?

'Big feet' (surface area) seems to be the general solution, in addition to "They sink into the ground a bit". Largest land animal being the elephant, foot diameter of 40-50cm, area of about 2 square f …
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  • 149
3 votes

Tunnels under the ocean

If you did such a tunnel, you will have to build a pipe inside it, to prevent the pressure from collapsing it. If you are building your city out of handwavium, might as well build a tunnel out of it. …
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  • 149
0 votes

Power cable from earth to the moon?

Given the capacity to 'beam' power to the moon in so many forms, why a power cable? Or solar on the moons? If you need a midway point...a 'beanstalk' or 'space elevator' to get out of the atmosphere, …
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  • 149
0 votes

Advantages of "Spider Mechs" over Tanks?

So. Tanks are built for a specific battlefield role. Optimized for it. While we call it a 'Spider Tank', it may not necessarily fill that precise role. As noted in other answers, a legged vehicle has …
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  • 149