gavin ashenden, essosreer— joined by dr. gavin ashenden, associate editor— joined by dr.to produce a few-rm— layer, they managed to produce a few-rm-rewers- layer, they managed to produce a few-rm-rewers. - layer, they managed to produce a few-in-layers. asi few cells in several layers. as rbe— few cells in several layers. as we eseersb— few cells in several layers. as the research has— few cells in several layers. as the research has been- few cells in several layers. as the research has been done in mice well as in human human mice as well as in human human cells. so we know that these particular blastula cannot go on and produce embryos and thus human beings. so we're at a much earlier stage than people thinking that from this research , which necessarily we can go on and produce a human embryo and then a human being without fertile ization. what it does do, though , is give us enormous do, though, is give us enormous insights into the way that cells interact with each other and form the structures that we know form the structures that we know form human beings. and fr