Conjoined twins is fusion, in which a fertilized egg completely separates, but stem cells (which search for similar cells) find similar stem cells on the other twin and fuse the twins together. Conjoined twins share a single common chorion, placenta, and amniotic sac, although these characteristics are not exclusive to conjoined twins, as there are some monozygotic but non-conjoined twins who also share these structures "in utero". The most famous pair of conjoined twins was Chang and Eng Bunker (Thai: อิน-จัน, In-Chan) (1811–1874), Thai brothers born in Siam, now Thailand. They traveled with P.T. Barnum's circus for many years and were labeled
Stieber Twins Stieber Twins The Stieber Twins are a duo from Heidelberg, Germany, consisting of the brothers Martin (Marshall Mar, a.k.a. Martin Jekyll) and Christian (Luxus Chris a.k.a. Christian Hyde). They are known as graffiti artists, breakdancers, rappers, hip hop producers and DJs. The twins have been active since about 1983, and the two have been producing hip hop music since 1992. Their first instrumental was on the album "Alte Schule" ("Old school"), the first songs which featured the twins rapping were "HipHop und Rap" ("HipHop and Rap") and "Allein zu zweit" ("Alone Together") and were released in 1995 on the album