Contamination blamed in STAP stem cell debacle
Investigation finds new form of flexible cells were really embryonic stem cells
![Mouse embryo](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/12/15_0.jpg?fit=860%2C460&ssl=1)
Researchers who claimed to have grown a mouse fetus from stem cells made in acid baths were actually working with embryonic stem cells, an investigation finds.
H. Obokata