1. When do human beings begin? scientific myths and scientific facts
2. An embryologist Keith Moore writes “Human development begins at fertilization, the process during which a male gamete or sperm (spermatozoon) unites with a female gamete or oocyte (ovum) to form a single cell, the zygote.” Moore, Keith L., Persaud, T.V.N. Before We are Born: Essentials of Embryology and Birth Defects, W. B. Saunders, Philadelphia, 1998, p. 36. Another embryologist, Waheed Rana writes “Embryonic life commences with fertilization which is the progression of events that begins when a spermatozoon makes contact with an oocyte or its investments, and ends with the intermingling of maternal and paternal chromosomes at metaphase of the first mitotic division of the zygote.” Rana, WaheedM. Human Embryology Made Easy, Overseas Publishers Association, Amsterdam, 1998, p. 25.
3. Isolation of a stem cell for neurons and glia from the mammalian neural crest
4. Bone Marrow as a Potential Source of Hepatic Oval Cells
5. Turning Brain into Blood: A Hematopoietic Fate Adopted by Adult Neural Stem Cells in Vivo