There are many well-known excellent blogs like the ones by T. Tao, G. Kalai, J. Baez, etc. Many of them use the WordPress engine.


I have been surprised to find that there are some excellent blogs on some unconventional platforms like [Telegram](https://en.wikipedia.org/wiki/Telegram_(software)) (created in particular by mathematician [Nikolai Durov](https://en.wikipedia.org/wiki/Nikolai_Durov)) or Twitter. Telegram blogs ("channels") seem to be "invisible" outside Telegram.


**Question:** what are some not so well-known, but noteworthy math blogs on some "non-standard" platforms, especially invisible from the outside?


Let me give some examples. Some of the following blogs by MathOverflow participants:


Twitter:


* [@littmath](https://twitter.com/littmath) (in English) by [Daniel Litt](https://mathoverflow.net/users/6950/daniel-litt)


Telegram:


* [Graphs and Machine Learning](https://t.me/graphML) (in English) by Sergei Ivanov
* [Математические байки](https://t.me/mathtabletalks) (in Russian) by [Victor Kleptsyn](https://mathoverflow.net/users/31371/victor-kleptsyn)
* [tropical saint petersburg](https://t.me/tropicalgeometry) (in Russian) by [Nikita Kalinin](https://mathoverflow.net/users/4298/nikita-kalinin)
* [fpmath](https://t.me/fedyap) ( English/Russian ) by [Fedor Petrov](https://mathoverflow.net/users/4312/fedor-petrov)
* [Математическая свалка Сепы](https://t.me/math_dump_of_sepa) (in Russian) by Sergei O. Ivanov



Mathematical blogs on "non-standard" platforms (Telegram, Twitter, Dzen , ... )
44 Telegram math channels are [here](https://t.me/math_channels) (5 in English).


