xkcd is one of the most relatable, nice and smart cartoonist you can ever find on the internet and in Academia. It is simply impossible to walk down the corridors of any of the Physics/Maths/Chemistry/CS Department without seeing at least a couple of xkcd pictures hanged on the doors.

Here is a (still in progress, probably never-ending) collection of my favourite pictures, divided by subject.

Physics

Mathematics

Computer Science

Miscellanea