Conjoined twins a single fertilized egg does not fully split during the process of forming identical twins. The second theory is that a fusion of two fertilized eggs occurs earlier in development. Although conjoined twinning has not been linked to any environmental or genetic cause, they occur so rarely it has not been possible to draw firm conclusions. Surgery to separate conjoined twins may range from very easy to very difficult depending on the point of attachment and the internal parts that are shared. Most cases of separation are extremely risky and life-threatening. In many cases, the surgery results in the death
Winklevoss twins Winklevoss twins The Winklevoss twins (; born August 21, 1981; also humorously referred to as the Winklevi or Winklevii) are American rowers and Internet entrepreneurs, Cameron Winklevoss and Tyler Winklevoss. They competed in the men's pair rowing event at the 2008 Beijing Olympics. They are known for co-founding HarvardConnection (later renamed ConnectU) along with Harvard University classmate Divya Narendra. In 2004, the Winklevoss brothers sued Facebook founder Mark Zuckerberg, claiming he stole their ConnectU idea to create the popular social networking site, and ultimately received $65 million. They are now venture capitalists, and have led a seed funding round for