Maths read I found interesting and useful:
General tips for studying mathematics written by Dr Daniel Mathews
Career advice given by Dr Terence Tao
A nice article on proof and progress in mathematics written by Dr William Paul Thurston
A list of interesting mathematics articles provided by Gaurav Tiwari
A talk given by Dr Daniel Mathews on some of the mathematicstics of Maryam Mirzakhani
The Mathologer channel in Yoube by Dr Burkard Polster
The book A Dingo Ate My Math Book: Mathematics from Down Under by Burkard Polster & Marty Ross
The talk by Dr Heiko Dietrich on How do you become a professional mathematician?
Gabriel's Horn: An interesting and beautiful object with infinite space but finite volume