Craniopagus twins conjoined twins develop inutero remains unclear. Embryologists have traditionally attributed identical twinning as "splitting or fission" of either the inner cell mass of pleuripotential cells or early embryonic disc at 13–14 days of gestation just before the primitive streak. Some theorists suggested that conjoined twins develop as a result of the failed fusion of a single fertilized ovum. However a new hypothesis suggests that cranial fusion occurs between two separate embryos before the end of the 4th week of gestation. This can happen because the cranial neuropore is still open, which is responsible for the ultimate fusion and formation of
Solar Twins (band) also provides vocals for the following projects: Solar Twins (band) Solar Twins are an English electronica duo with Joanna Stevens (vocals) and David Norland (producer/all instruments/vocals). Solar Twins were signed by Guy Oseary at Maverick Records after playing at Viper Room. They are known for their version of Rock the Casbah, found on the soundtrack to the film "Brokedown Palace". They made one album, and split after attempting a second, thwarted by insurmountable creative differences. David Norland moved into composition for television and film, as well as producing other artists. Norland recently composed the score for the critically acclaimed film