Dramatic retraction adds to questions about stem cell research
Researchers admit mistakes and question whether STAP cells exist
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SEEING DOUBLE Scientists now doubt their own earlier claims about an easy method to make stem cells. Among the errors identified in their papers were two pictures of a single embryo created from STAP cells (green) that had been represented as depictions of two different embryos (large image with placenta, inset without placenta).
H. Obokata et al/Nature 2014