Genady

I think it scared them.

No, I mean I don't believe it's a practical problem. Regardless, I gave you the equation above that solves the problem. Is it unsatisfactory? Where in the world the sunlight comes vertically like in the picture? How often does it happen and how long does it last?

I don't believe it.

Another answer is the attitude of my father-in-law, in his words, "Do it and it will be done."

If I've guessed correctly which angle, then you get the equation 0.5*sin(x)+(0.5-0.5*cos(x))*tan(2x-π/2))=5 OTOH, it can be as small as 0.

0.5 factorial?

Radius/diameter can be anything between 0 and infinity.

Optimum what?

I don't know about an ecological importance of freshwater mussels, but I have witnessed how instrumental they were in recovering of a popular SCUBA diving spot in PA, USA, called Dutch Springs. It is an old, abandoned quarry filled up by fresh water naturally. The water was getting more and more cloudy every year until the visibility was practically 0. Then the management introduced freshwater mussels one late fall as the quarry closed for the winter. By next spring when the quarry opened again for visitors, the water was clear with the visibility in tens of meters. Pretty much everything underwater was covered with a mat of mussels, but nobody cared. There suddenly was a lot of light and colors, fish, seaweed, rocks, wrecks, etc.

What is suggested to do about it?

Viruses are a good food for these bacteria: The consumption of viruses returns energy to food chains | PNAS

Yes: Amazon.com: The Cellular Automaton Interpretation of Quantum Mechanics (Fundamental Theories of Physics, 185): 9783319412849: 't Hooft, Gerard: Books

Well, t' Hooft explained how they do not contradict each other.

There is a completely different possibility avoiding this apparent problem without going backwards in time or faster than light: nothing is in fact random. Not only the results of the measurements, but also the measurements themselves. All is completely determined, not just since the particles were prepared in the entangled state, but way before that, since these particles, or their ancestor particles, and the particles of Alice and Bob, and particles of the rest of the universe were "on top of each other" and interacted among themselves. It is pre-determined when and how the particles will be entangled and everything that happens to them, and to Alice and Bob, after that (I've learned this idea from 't Hooft.)

I don't think it can be done generally. The QM calculation for the states of spin-entangled electrons, for example, is just a vector algebra (in the 2D complex vector space). There is no time in this calculation at all. Nor space. However, it describes the entire phenomenon.

Not good enough. All other observers disagree about a speed with which the car is moving. An observer standing on the side will see one speed. An observer in another car passing the first one will see a different speed. An observer walking along the street will see yet a different speed. An observer on the Moon, on the Sun, in the center of the Milky Way, in Andromeda galaxy, ... they all see different speeds of the same car. Some very different. For example, the observer in the center of the Milky Way sees the car moving together with the whole Solar system with the speed 820 000 km/h. What is the car's speed "from a global observer point of view"?

Perhaps one could think about a "communication" going back and forth in time, just like one could think about positrons being electrons moving backwards in time. It might help one heuristically, albeit not adding anything to physics.

A ruler does not measure distance, a ruler is distance? A scale does not measure weight, a scale is weight? A thermometer does not measure temperature, a thermometer is temperature? A depth gage does not measure depth, a depth gage is depth? A pressure gage does not measure pressure, a pressure gage is pressure? A speedometer does not measure speed, a speedometer is speed? Etc.

Not only that seasons would not exist, but also a year would not have any meaning, except for a purely astronomical curiosity of repeating star patterns.

Ahh, me too.

Why would it be, if it to which you agreed.

Different observers, no contradictions. The crucial fact here is that Alice does not know the result of her measurement before she makes the measurement. Same with Bob.

No. Different observers can deduce different things. Especially, since wave function is not an observable.

Yes.

Professional psychotherapy?