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 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 ...

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 ...

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 ...

Over the years that scientists have been inserting human cells into the embryos of mice, causing the furry creatures to grow Mini Me versions of human tissues and even brain structures, none of the ...

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 ...

The NewsHour Science Unit looks at the debate over scientific research that involves transplanting human stem cells into animal brains. On the Caribbean Island of St. Kitts, these surgeons are ...