One of:

• eyes to see a wider spectrum of light (infrared to gamma-ray)
• ears to increase sensitivity or reduce it close to 0 a will
• nose to smell all dangerous stuff that is odourless (carbon monoxide f.e.)
• muscles not to lose training after a few days (I am not sure that wouldn’t fuck up methabolism)
• have an organ to catch radiowaves (while being capable to switch it off)
• brown fat cells to never feel cold (with added super bonus that they also kill cancer by starving it)
• liver to remove toxins without being easily damaged

The choice is difficult :)

This is right. This requires a discussion a bit wider than 420 letters, even more when they come from Rowling

Km is 10³m cm is 10^-2m so the difference is 10⁵ i.e. 100000 (one with 5 zeroes)

Or more intuitively one centi-meter is a 1/100 of a meter and Kilo-Meter is 1000 meter therefore 100*1000 100000

It is quite intuitive, once you start using it

What’s weird is why we don’t use Megameters and megagrams (i.e. one metric ton)

If only there was a solution, I don’t know, a cable resistent to jamming the ether, something we could call ether-jamming-resistant-network, in short Ethernet

I know… I am just dreaming :-P

This man codes

I thought, depending on context, might mean rest in peace or rest in piss…

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They did: https://en.m.wikipedia.org/wiki/Death_(cigarette)

Not really, the chances to find a winning ticket of a lottery walking on the street is almost comparable

Not disagreeing, but you are describing almost every company or corporation above a certain size