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Stem Cells from Virgin Eggs

Nonviable embryos could answer ethical concerns

By
9:36am, October 16, 2007

Last winter, two female Komodo dragons at separate zoos in England gave their keepers big surprises. With no contact from any male, each of the giant lizards laid a clutch of viable eggs, some of which hatched healthy young (SN: 12/23/06, p. 403). The events made the news because they were the first known examples of the species reproducing by the asexual process of parthenogenesis, or virgin birth.

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