Two research teams in the US and Japan have made embryonic stem cells – or something very like them – directly from human skin cells, without having to destroy an embryo in the process.

美国和日本的两个研究小组已直接从人体皮肤细胞中提取出胚胎干细胞（或非常类似的细胞），同时在这一过程中没有破坏胚胎。

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In an E-mail, the journal cited the highly publicized 2004 fraud that came out of South Korea, where researchers led by Hwang woo-Suk claimed to have produced stem cells from a cloned human embryo.

在一封e - mail中，自然杂志特别引用了2004年广为传播的韩国Hwang woo - Suk小组得到人类克隆胚胎的丑闻。

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One rejected proposal included a plan to clone a human embryo and use it to produce new stem cells. Dr.

一项被拒绝的方案包括计划克隆一人胚胎、并用之来制造新的干细胞。

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They used stem cells from a human embryo, which are capable of becoming any other type of cell in the human body from nerve to skin, muscle to kidney.

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After all, to obtain these stem cells, you must destroy a human embryo.

NPR: Ethical Guidelines for Stem Cell Research Proposed

The success also provides encouragement that useable stem cells can be found from other sources apart from the human embryo, which remains controversial.

BBC: Stem cells repair heart attack damage