One of the biggest science stories last year was the research on stem cells announced by South Korean scientist Hwang Woo-suk. But now it appears that the research was false.

• 上年科学界重大事件之一就是韩国科学家黄禹锡宣布了在干细胞方面的研究成果。但是现在看来这个研究成果是虚假的。