Instead, they want to use somatic cell nuclear transfer, the same process used to clone Dolly the sheep in 1997, to create embryonic stem cells.

FORBES: Cloning's High Cost

Right now, scientists can only use stem cells to study particular diseases by creating embryos through the same process used to clone animals like Dolly the sheep.

FORBES: Stem Cell Science Heats Up

His role in cloning Dolly the sheep, the world's first clone from an adult cell, led to an OBE in 1999 and he has been elected to five scientific academies worldwide.

BBC: Dolly creator heads Scots honours

His role at the Roslin Institute in cloning Dolly the sheep, the world's first clone from an adult cell, led to an OBE in 1999 and he has been elected a fellow of five scientific academies worldwide.

BBC: Dolly the sheep creator knighted

Dolly and the donor sheep were genetically identical, like twins, except that the clone was much younger than the other.

FORBES: Geron Gets Cloning Patents