JAPAN - JANUARY 09: Shinya Yamanaka, Stem Cell Researcher, Kyoto University In Tokyo, Japan On January 09, 2008 - Shinya Yamanaka, a professor of Kyoto University, attends a press conference in Tokyo, January 9, 2008 - Yamanaka and his team invented a way to transform human skin cells into Induced Pluripotent Stem (iPS) Cells which has a potential to become any types of cell in the human body - Previously, the only way to create stem cells was to isolate them from an early stage embryo, a controversial process that destroys the embryo. (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)

JAPAN - JANUARY 09:  Shinya Yamanaka, Stem Cell Researcher, Kyoto University In Tokyo, Japan On January 09, 2008 - Shinya Yamanaka, a professor of Kyoto University, attends a press conference in Tokyo, January 9, 2008 - Yamanaka and his team invented a way to transform human skin cells into Induced Pluripotent Stem (iPS) Cells which has a potential to become any types of cell in the human body - Previously, the only way to create stem cells was to isolate them from an early stage embryo, a controversial process that destroys the embryo.  (Photo by Kurita KAKU/Gamma-Rapho via Getty Images)