operation. conjoined at the back of their heads from birth a year ago, separation surgery was meticulously planned between major blood vessels in their heads. a very delicate task — one bleed could be catastrophic. translation: of course, after all the preparationsl and all of the models we have built in a designated surgery room, we specifically prepared for this thing with a surgical theatre and vr of the twins and with a 3d model we prepared in advance. where the two were attached, there was no skin and skull, so doctors needed the babies to essentially grow more skin. inflatable silicon bags were inserted into their heads and gently expanded to expand their skin slowly. this meant that when doctors reconstructed their skulls after the separation, they had excess skin, which they could use to seal their new heads.