It's being called a tremendous milestone involving one of the biggest medical controversies of our time.
Researchers in the U.S. and in Japan say they have been able to take cells from skin and make them act like stem cells.
This would not involve destroying or cloning human embryos.
Stem cells, experts believe, hold the potential for treating diseases like diabetes and Parkinson's.
Scientists say the research has a long way to go, but this could be a big step forward.