> "factors other than father’s age do not seem to contribute substantially to the mutation rate diversity in our data". But as another poster already pointed o

> "factors other than father’s age do not seem to contribute substantially to the mutation rate diversity in our data". But as another poster already pointed out, age could be hiding other factors. Exposure to environmental factors that could cause mutations change with time, e.g, older fathers would have been exposed to pesticides that were banned before younger fathers were born, nutritional changes, etc...