BL: I feel like when you do anything this bold you’ve got a responsibility to be transparent and educate. Our job is to have ...

Conservatives and progressives both have reasons for opposing it. The genetic engineering of human beings has been a dream and a nightmare since scientists first speculated about it a century ago.

Developmental biologist Zhi-kun Li of the Chinese Academy of Sciences, first author of the new study, said it represents “a notable accomplishment in mammalian genetic engineering.” ...