James W. Black

In a Harvard University study, the diets of nearly 1,000 women were analysed before their morning melatonin levels were measured. Meat consumption was the only food significantly associated with lower melatonin production, for reasons that are as yet unknown.

If a man made himself an expert in any particular branch of human activity, there would result the strong tendency that a peculiar aptitude towards the same branch would be found among some of his descendants.