Fossils reveal that there were at least two kinds of koala when humans first arrived in Australia, but one died out about 30,000 years ago when the west of the continent dried out

NHS England is pulling its open-source software from the internet because of fears around computer-hacking AI models like Mythos. Opposition is growing among those who say the move is bad for transparency and efficiency, and will also do nothing to improve security

Three people have died on board the cruise ship MV Hondius due to an outbreak of hantavirus, a rare illness transmitted by rodents

A biopsy of a woman's cancer seems to have triggered an immune response against the tumour, putting her into remission

Doug Whitney has a genetic mutation that means he should have developed Alzheimer’s disease decades ago, but his long-term work in hot engine rooms may have protected him in a similar way to sauna therapy

Two quantum computers and two supercomputers teamed up to break the record for the biggest molecule yet to be simulated using quantum hardware