Stem cell researcher Dr Haruko Obokata on 'breakthrough'
30 January 2014 Last updated at 14:14 GMT
A young researcher in Japan has been facing the world's media after her stem cell studies were heralded as a "major scientific discovery."
Dr Haruko Obokata's work, published in the journal Nature, showed stem cells can now be made quickly just by dipping blood cells into acid.
The breakthrough at the Riken Centre for Developmental Biology was achieved in mouse blood cells, but could have the potential to start a new age of personalised medicine.
Rupert Wingfield-Hayes reports.