Talking or reading. Texting a message or listening. The dilemma of choosing between various tasks is not an invention of the modern information age. Humans and all vertebrates have to prioritise their actions.

Sabine Bahn is a neurobiologist, psychiatrist and director of the Cambridge Centre for Neuropsychiatric Research at the University of Cambridge, UK.

With a drop of blood and some laboratory analyses, doctors have been able to tell patients whether they suffer from diabetes or some sort of cancer.