For general science I like Knowable Magazine (RSS)
Both are pretty accessible but fairly meaty, hopefully that’s what you’re after. Ars Technica has some lighter stuff.
https://en.wikipedia.org/wiki/MathWorld
https://mathworld.wolfram.com/
I see people using wolfram occasionally.
I suggest and support (and endlessly scroll thru) Mastodon Science
mander.xyz is lemmy, so I don’t know if it counts, but the local comms are all science oriented and have science articles. The server is supposed to be life-sciences oriented, but I think the space comm is one of the largest.
Op wants nothing to do with any part of lemmy that is not lemmy.world for whatever reason.
Might sound weird, but hackaday.com is a good site for engineering and science. Once I made it a regular spot, I started to learn a lot in the realm of STEM and security.
