Children born to older fathers are uglier compared to those born to younger fathers.

The researchers recruited a group of six men and six women and showed them over 8,000 pictures of 18-20 years old men and women and found that the participants consistently rated children of older fathers as less attractive.
“Every 16 years the mutation rate doubles. Other researchers found 25 mutations per sperm in a 20-year-old, but at age 40 it is 65 mutations. By 56, it doubles again. The effect is very visible - someone born to a father of 22 is already 5-10 per cent more attractive than those with a 40-year-old father and the difference grows with the age gap”, lead researcher Martin Fielder said.
Source-Medindia