If you look very carefully, you see that his skull has been replaced with a transparent Plexiglas dome so that the workings of his brain can be observed and also controlled with light.
Ak sa pozriete pozorne, zistíte, že namiesto lebky má priehľadnú kupolu z plexiskla, takže možno vidieť, čo sa deje v jeho mozgu a kontrolovať ho svetlom.