(This video is no longer available for streaming.) In this story from January 2006, NOVA scienceNOW reports on stunning developments in the field of stem cell research. The South Korean scientist heralded a year earlier for his innovative research is found guilty of fabricating his results, including reportedly groundbreaking work cloning human embryonic stem cells. The Korean fiasco casts a cloud over the field, but U.S. researchers still move forward, believing that embryonic stem cells hold great potential for medicine. As part of this advancement, a team led by Rudolf Jaenisch at MIT explores a way to produce embryonic stem cells without using an embryo that can develop into a fetus.