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“…Bioelectric enhancements are cranky. It’s not just a case of sticking an artificial arm on.
The surrounding bones and fibres have to be hardened and supported, or else the new arm will rip clean off your shoulder the first time you flex.
You’ll need tensile support across your back, or your spine will snap the first time you lift something heavy.
. . .
You need new skin; human skin isn’t tough enough to handle the subcutaneous tension of superhuman strength."

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"You’ll take a chip in your brain to handle the specific dataload from the artificial nerve controlling the arm…”

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Mr Kent's fascinating ability of personal flight is entirely dependent on gravity.
Our observations from afar have shown that he stores a particular wavelength of solar energy -- one that his cell structure is actually designed to convert.
This fuels several different alien organs that doubtless lie dormant under different kinds of sunlight. Perhaps he was as weak as a kitten on his home planet.
At least two of these organs act on what we presume to be the Unified Field, accounting for his miraculous powers.
On Earth, he can refract gravity. This seems to create his flight, speed and possibly his strength.
But take Mr Kent away from a diffused sunlight, or exert him at night. Decrease gravity.
...
And things are much different.

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