Count Bayesie;
Rambling Maths;
Mathematical Gemstones;
Gowers’ Weblog;
The n-Category Café;
Gödel’s Lost Letter;
What’s New (by Terence Tao);
AMS Blogs;
Tanya Khovanova’s Math Blog.
Stand-up Maths
Numberphile
Michael Penn
3Blue1Brown
Richard E. BORCHERDS
Tom Rocks Maths
Computerphile
Aleph 0
Instituto de Matemática Pura e Aplicada