The last thing the controversial field of human cloning needed was another controversy.
But an ethical scandal has erupted around the world's leading cloning scientist that could mean a major setback for stem-cell research, medicine's most promising, yet polarizing subject.
South Korea's star scientist, Hwang Woo-suk, who successfully cloned the world's first human embryo in 2004, admitted yesterday that he had violated ethical standards while conducting his work.
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