The Big Three · Brain
Folding packs a large sheet into a small skull.
The wrinkles aren't decoration or a sign of intelligence in any simple sense. The thinking layer of your brain is a sheet only a few millimetres thick — and folding is how a large sheet fits into a skull that has to pass through a birth canal.
There's more: folding packs a large sheet into a small skull. The full explanation — and the interactive version you can tap and quiz yourself on — lives in the app.
Body Atlas is an educational product. It does not provide diagnosis, treatment, or personal medical advice. · Privacy