There are hundreds of different cell types that make up the human body, each derived from a single origin: the fertilized egg. Researchers investigating how this complexity arises have made ...

An international team of researchers has created embryos containing both human and monkey cells, the Spanish newspaper El País reported July 31. The controversial project was conducted in China, ...

An ethical debate has been sparked after the announcement that a Spanish and US research team has created the first human–monkey chimera, in a lab in China. But could this novel approach change the ...