Just a week after Scottish embryologists announced that they had succeeded in cloning a sheep from a single adult cell, both the genetics community and the world at large are coming to an unsettling realization: the science is the easy part.

• 在苏格兰胚胎学家宣布他们成功地利用单个的成体细胞克隆出绵羊后仅一个星期，遗传学界和整个世界都不安地意识到一个问题：科学问题本身并不难。