Monkey embryos containing human cells have been made in a laboratory, a study has confirmed. The research, by a US-Chinese team, has sparked fresh debate into the ethics of such experiments.

10) in the journal Science. The researchers revealed the pattern in a series of lab experiments conducted in mouse, rabbit ...

The researchers found problems with the way DNA was "read" in cloned monkey embryos and their placenta. This resulted in the placenta developing unhealthy calcified regions. To see if they could ...

She has already developed synthetic mouse embryos with evidence of a developing brain and beating heart. Meanwhile, scientists in China have implanted synthetic monkey embryos into female monkeys ...