Wrinkled brain mimics crumpled paper

Power law relationship for folding applies across species

PAPER TOSS  When sheets of paper were scrunched, variations in surface area (larger on the left) led to balls with different levels of crumpled folding. Surface area is one part of a new equation that may help describe how brains fold.

Suzana and Luiza Herculano-Houzel 

Cramming a big brain into a skull may be as easy as just wadding it up.