This is a 7-day-old embryo that scientists kept alive in a laboratory dish. If it developed further, the clusters in green would become cells that shape the body and the red/purple cells would ...

scientists in New York have created half human-half chicken embryos in what some have described as 'sick' and 'disturbing' experiments. However, researchers hope that by transplanting human stem ...

And there’s a lot more to come, not least a plan to create a mouse with a brain made entirely of human neurons. There is no sinister intent behind these experiments: chimeras would be ...

A scientist in Sweden has started experiments on healthy human embryos in which DNA is altered ... So it's undergone cell division in this last half hour or so while it's been sitting there.

Ali Brivanlou slides open a glass door at the Rockefeller University in New York to show off his latest experiments probing the mysteries of the human embryo ... perhaps only half joking. Brivanlou ...