The researchers looked at data on children featured in the British Cohort Study - a large group of people born in April 1970 - to look at the link between reading and maths scores at age 10, and earnings at ages 30, 34 and 38.

BBC: Maths skills add up to higher earnings, study finds

The study collected data from the Millennium Cohort Study, a national study of infants born in the UK between 2000-2002.

BBC: Light drinking 'not harmful to baby' say scientists

By the end of their careers, NFL players may emerge with all sorts of injuries -- chronic pain, arthritis, joints needing replacement, depression, diabetes, heart problems and concussion-related dementia, among others -- so many they have become a cohort ripe for study.

CNN: STORY HIGHLIGHTS