Scientists in China have engineered embryonic stem cells to produce lab mice with two male parents. Though these mice reached adulthood with developmental issues, the method offers insights into ...

Developmental biologist Zhi-kun Li of the Chinese Academy of Sciences, first author of the new study, said it represents "a ...

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.

Genetic engineering, also known as genetic modification, is a set of technologies used to change the genetic makeup of cells, including the transfer of genes within and across species boundaries to ...