Dullahans are demi-humans whose heads are separate from their bodies. Naturally, Tetsuo is intrigued by the unique traits of dullahans, but Kyouko is just as interested in learning more about her own body. Tetsuo has the idea to ask the opinion of someone outside of his own background in biology, so he takes Kyouko to meet Souma, an old college buddy.
Yes, precisely. Occasionally called 
"hyperspace" in sci-fi works.
"نعم، بالضّبط. إنّها تسمّى "الفراغ الفوقيّ
.في أعمال الخيال العلميّ
Ja, präzise.
Sí. Suelen llamarlo hiperespacio
en la ciencia ficción.
Sí. Suelen llamarlo hiperespacio
en la ciencia ficción.
Oui, en effet. On parle parfois
d’hyperespace, en SF.
Esatto. Proprio così.
Isso, na mosca! Costumam 
chamar de hiperespaço na ficção.
Да, в фантастике её ещё
называют гиперпространством.