Gene-editing experiment turns hamsters into hyper-aggressive bullies, shocking scientists.

Neuroscientists were "surprised" by hamster gene-editing outcomes.

Eliminating vasopressin activity was supposed to calm the hamsters.

A significant amount of hostility was seen in the hamsters who had their genes altered.

The GSU study, published in PNAS, explored the biochemistry underpinning mammalian social behaviour.

Syrian hamsters and CRISPR-Cas9 were used to switch genes on and off in cells. The technique wiped away a vasopressin receptor, an aggressive hormone.

Scientists expected this to "dramatically" change the Syrian hamsters' social behaviour, making them more calm. Their conduct changed, but not as intended.

50 years after discovering a Milky Way black hole, he saw it.