2020 was a really weird year with lots of surprises. Some good, plenty bad and Linux seeing a fresh port to the Nintendo 64 was also a thing that happened.
One we missed from late December while we took a short holiday: developer Lauri Kasanen put out an RFC (request for comments) noting that there have been other attempts in the past but this is not based on either. Kasanen also noted it's being sent as an RFC as they're "not sure if it's useful to have this merged" considering it's an "Old, niche, and limited platform". Fun for a day project perhaps? Not particularly useful for many uses though considering the power.
Answering the inevitable "but why?" questioning, Kasanen said "Having Linux available makes it easier to port emulators and fb or console games. www.linux-mips.org/wiki/Nintendo_64 can be edited to no longer say "vaporware". Most importantly, because I can".
This is not a special full distribution either, what they're providing simply allows the Linux Kernel to boot up on it and you can find their bootloader up on GitHub. Sounds like it's a bit rough too, going by the readme. It's always amazing to see projects like this, even as just the for-fun part of hacking away at tech. The answer to "but will it run Linux?" is almost always a Yes if someone spends a few minutes looking into how.