The man accused of killing eight people at massage parlours in Atlanta saw them as “a temptation for him that he wanted to eliminate”, police officers said.

Australian researchers’ development of model embryos will ethically improve treatments for a wide range of critical medical issues.

Australian researchers’ development of model embryos will ethically improve treatments for a wide range of critical medical issues.

The discoveries offer access to some of the first moments of human life – and open up a host of new ethical questions.

The model embryos, which use no egg or sperm, offer a chance to study the earliest days of human development, but there are calls for a debate over their status and what research can ethically be performed on them.