considering the size of an atom is roughly 0.1 nm, someone who today saying that they'll make 0.01 nm chip will be laughed out of the room. Our physics and engineering is not solid enough to create subatomic transistor.

Because NBA season is 82 games, the net rating is better correlated with their performance than say NFL which is only 17(mostly 16 in prev season), so in NFL it's entirely possible for a team to win 60%/10 games and still have negative net rating but once you pass like halfpoint/42 games in NBA team that win 60%/26 games out of 42 will have positive net rating (not always though, the better benchmark is somewhere around 60 games, this is when team starts blatantly tanking as they can get clear picture of their position in the draft)

It's more like special server that is not only used to store stuff but also to do heavy-work jobs like AI, simulation (especially near real-life one) rendering animation etc.

Second-hand GPU is definitely go down in price. 3060 Ti second is around $300 or cheaper here. Even the series 20 can be obtained quite cheaply (there's someone who claim that they get 2070 Super for just $200, although this listing is a rarity). The AMD RX 6600/6650 XT is always a really nice budget GPU(they're the winner for fps/$ for 1080p and 1440p). There's also a rumor about intel arc 750 being discounted to $250 now, although you need to check for this yourself. The 16xx series is also quite cheap, though obviously the upgrade might not be as big as you hope.

Ethereum's move to PoS basically made GPU mining almost unprofitable, so there's tons of second-hand GPU flooding the market, and if you/your hubby knows how to benchmark the GPU they're usable (Mining rig usually undervolt the GPU so they're often just as good as normal second hand GPU, but not every miner takes good care of their rig).

There's actually 2 listing on eBay for 2070S under $200, but they look very sketchy.

tbh My biggest sin is Hubris, and if I have money the thing I'll be proudly showing to other people is how good my telescope is at seeing some astronomical object. I'm always tried to soothe it by thinking that hey, at least my hubris makes at least one more person interested in science, it could be worse.

the last one is the consequences of observable universe though. Yeah there's a point where light simply can't reach the other side, because the expansion is faster than the speed of light, thus limiting the size of the observable universe (of course, this is assuming our prediction/projection is really true which is the farther an object is from the center the faster the expansion rate is between them and center).

And you don't have to assume that earth is the center of our observable universe, since it is (or rather the center of your observable universe is you).

Most human lives near flood plain/valley/ water banks. I would say it's more of coincidence more than anything. They are the best place to farm, but also the place that got wrecked by flood (although the flood, or rather the sediment left by it is the reason they're a fertile farming ground to begin with).