Depending on your definition of "random", you can see when and why the Crofton formula works.
Read more: Experiment with the Crofton formula
A One-minute story by István Örkény
Read more: Örkény: 1949
Brilliant book
Read more: Vuillard: The order of the day
PhD at the Bolyai Institute
Read more: PhD at Bolyai
Best spirographs on the web
Read more: Spirographs on the web