Technology

A mystery interstellar object discovered by British astronomers is most likely the oldest comet ever seen.

One of the UK's best-known doctors says he has resigned from the British Medical Association (BMA) because it has "effectively encouraged young doctors to strike".

Heat-related deaths in England and Wales could rise 50-fold by the 2070s as climate change collides with an ageing population, a study has warned.

Four people have been arrested by police investigating cyber attacks targeting M&S, Co-op and Harrods.

A robot has performed realistic surgery on its own with 100% accuracy, researchers have announced.