In my area, some people put small solar nodes on top of high buildings (office, university, and apartment). The node on my roof can directly communicate with one of these nodes ~20km away. Pretty crazy tor something that can run indefinitely on a 18650 battery and small solar panel. I’ve heard some people just place “guerilla nodes” to extend coverage.

Postgres is basically an open source version of Oracle DB. Much more featureful than MySQL. I believe Oracle bought MySQL just to kill it.

China is now the world leader in science by most metrics (largest proportion of the top 1% most cited papers, most publications to prestigious journals, etc). It makes sense, with their high population and their government willing to fund research. I’m guessing their culture is much less anti-intellectual than the West too, especially the US.