From The Telegraph UK:
Children of older fathers and grandfathers are more likely to live longer, research suggests.
11:23AM BST 11 Jun 2012
Experts found that children with older fathers had longer "telomeres", which are tiny caps on the ends of chromosomes that protect against ageing processes.
Like the tabs on the end of shoe laces which prevent fraying, these vital strips of DNA make cells less vulnerable to disease.
Professor Christopher Kuzawa, an anthropologist at Northwestern University in the United States, said in most cells telomeres shorten with time.
However, in sperm they lengthen. So, men who reproduce at an older age have children with longer telomeres compared with younger fathers.
Older fathers are often blamed for passing on genetic mutations to their children, causing some forms of autism, schizophrenia and other disorders.
Read the rest here.