Here is a very interesting paper titled “On the growth and form of cortical convolutions” by Tallinen et al. This paper is about the development of the sulci and gyrus in the brain and is worth a read. The sucli and gyrus are a result of molecular mechanisms but they are not alone. It is accompanied by mechanical instability.
The paper has received widespread attention on social media sites like twitter and facebook. The paper was published on 1st of February in Nature Physics. Don’t forget to have a look on the videos in the supplementary information.