Genetic differences in intelligence between the sexes helped explain why many more men than women won Nobel Prizes or became chess grandmasters, the study by Paul Irwing and Richard Lynn concludes.
They showed that men outnumbered women in increasing numbers as intelligence levels rose. There were twice as many with IQ scores of 125, typical for people with first-class degrees.
When scores rose to 155, associated with genius, there were 5.5 men for every woman.