- 8,682 viewsDuration: 1:37Mercy and Goodness are the first pair of conjoined twins to have parts of their new skulls designed using mixed reality. The two-year-olds, from Nigeria, were born conjoined at the head. The BBC spent time with the surgeon in the days leading up to the twins' final operation - a high-risk procedure which was carried out in Abu Dhabi. Subscribe: http://bit.ly/subscribetoafrica Website: https://www.bbc.com/africa Facebook: https://www.facebook.com/bbcnewsafrica/ Twitter: https://www.twitter.com/bbcafrica/ Instagram: https://www.instagram.com/bbcafrica/