Stem cell science has become notorious for obliging society to consider again where it draws the line between human embryonic cells and human beings. Less well known is that it also pushes us to ...

In scientific terms, a chimera is an animal with some DNA from another animal spliced into it. The chimeras you’re hearing so much about in the news are controversial because scientists are inserting ...

In the Iliad, the Greek poet Homer describes a fearsome beast known to inhabit Asia Minor, one known as a chimera. The ferocious creature had the head of a lion, the body of goat and the tail of a ...

Legislators should be careful that regulation of chimera research does not prevent life-saving research. The Congressional Biomedical Research Caucus briefed congressional staffers yesterday on ...

Pig embryos that had been injected with human stem cells when they were only a few days old began to grow organs containing human cells, scientists reported on Thursday, an advance that promises — or ...

Federal health officials said Thursday they are reconsidering a moratorium on the funding of research in which human tissues are transplanted into early, nonhuman embryos — creating organisms known as ...