Nothing C# specific, but you could run a binary search, with half of the input as the upper bound.

Crysis 3 sort of had this. There were stealth class enemies that wouldn't show up on the minimap and you couldn't track them with the "visor." But no completely absent minimap as far as I remember.

I used to live at an apartment with only 2 level 2 chargers and like 8-9 EV/PHEVs. Most of the time it was enough! I used to commute daily for 26 mi and can count on my fingers the number of times I had to charge at another charger over 2 years.

Not forgotten, a lot of people never learned how to do it. So many times I've seen people search for how to do something and inject their assumptions besides the keywords into the search terms. The official documentation doesn't even come up because those terms pollute the results.

What are you on about with "biology stops working"? The whole point of relativity is that there is nothing special about any speed less than c. All systems keep working just fine at any speed because they're at rest in their own reference frame. The radiation issue - agree, more or less.