SpaceThis physicist is hunting for the biggest black hole in the universe Astronomers have recently started looking for black holes bigger than galaxies. Brian Lacki explains how these “stupendously large black holes” might be used by alien civilisations, and what makes them such an intriguing possibility Features
MindThe secrets to keeping your brain sharp in old age Neuroscientist Emily Rogalski studies superagers – people in their 80s or 90s with unusually keen memories, whose lifestyles suggest ways to slow cognitive decline Features