South Korean researcher Woo Suk Hwang caused a scandal in 2005 by falsifying data about his attempts to make the first embryonic stem cells from cloned human embryos. However, new research shows that Hwang’s team accidentally made stem cells by another method that some scientists believe could be as important as cloning.
The stem cells produced in Hwang’s lab came from an embryo that grew from an unfertilized egg, not a clone, according to a new genetic analysis of the cells.
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