British boxer Herol Graham with his daughter Natasha after beating Jimmy Price in 1985. His pro career: 48 wins, six defeats and enough blows to the head to wreak havoc on the middleweight contender’s brain. Photograph: Getty Images

Just two and a half years after his last professional fight, Muhammad Ali was a guest on NBC’s Late Night with David Letterman. Dapper in a white suit(...)

Prof Tim Lynch said a cure for dementia is five to 10 years away. Photograph: Dara Mac Dónaill

Two groundbreaking discoveries by an Irish scientist, separated by almost 20 years, have shed significant new light on the causes of dementia and Park(...)