17-03-13 Artificial human life could soon be grown from scratch in the lab, after scientists successfully created a mammal embryo using only stem cells. 在科学家成功利用干细胞培育出哺乳动物胚胎后，人工制造的人类胚胎很快也将能够被培育出来。 Cambridge Universi...

12-01-10 As an embryo develops, different genes are turned on in different cells, to form muscles, neurons and other bodily parts. Inside each cell's nucleus, genetic sequences known as enhancers act like remote controls, switching genes on and off. Scientis...

11-07-20 How is it that a disc-like cluster of cells transforms within the first month of pregnancy into an elongated（细长的） embryo? This mechanism is a mystery that man has tried to unravel（解决，阐明） for millennia. The first significant step towards...

10-11-30 Long a staple（主要的，常用的） of nature documentaries, the somewhat bizarre（奇异的） development of a grub-like pink marsupial（有袋的） embryo outside the mother's womb is curious in another way. Duke University researchers have found that the d...