Having a "thick brain" may not be so bad after all. Scientists at Northwestern University, Chicago have discovered some of the secrets of so-called "super-agers" – those fortunate enough to retain brain power and memory into their eighties and nineties. With these super-agers the cortex (the area at the top and front of the brain) was thicker than in those who aged normally. A thicker cortex often means that older people can have memories as good as those decades younger.
According to a separate study undertaken by researchers at Rochester University, New York state, super-agers' brains also formed less of the toxic amyloid protein linked to dementia.