An Italian neurosurgeon says medical science now has the technology to transplant a human head. Doctor Sergio Canavero believes it's possible to reconnect the spinal columns of the donor and the person receiving a new head. Canavero says both heads would have to be removed at the same time and reconnected within an hour.  He says a team of 100 could perform the operation in 36 hours, at a cost of almost 13-million dollars.