It took years of attempts before scientists were able to clone a mammal from an adult cell. And with that success came plenty more questions.
Human-animal hybrids - or 'chimeras' - might sound strange, but they offer great hope for new life saving therapies, as long as key ethical boundaries are respected.
Controversy over a Chinese study that used CRISPR-Cas9 gene-editing technology shows how the West still looks at the East through the lens of Orientalism.
Researchers from Kyushu University, Japan, are the first to turn mice stem cells into mature eggs that can be fertilised.
Stem cells hold great promise for treating heart disease. But it's not so simple to get from stem cell to fully functioning adult heart cell, even in the lab.