Looks like a airport terminal map to me! 😭

Both

Very useful for photographer so they know where the property security can harass you or not

You should ask you Korean friends 😉

It's statistic, not just the detector. I mean, sure, one can be very lucky and happens to detect a neutrino decay with that small detector but to be consistently getting result? Good luck. Literally.

Yes you can build your own detector in the kitchen but good luck with getting a signal within your lifetime.

You do realize I have a degree in physics, right? I had to endure a semester of nuclear physics class 😂

"Of moderate energy"