aging

Health problems can put a strain on a marriage at any age. But as we get older, chronic illnesses can make it even tougher to keep the spark alive.

Scientists at the University of Chicago have uncovered one way couples can offset the stresses of illness and aging: more physical intimacy.

Couples who continue to be sexually active over the years report higher levels of satisfaction in their marriages, the sociologists reported last month.

Like other animals and many living things, we humans grow when we're young and then stop growing once we mature. But trees, it turns out, are an exception to this general rule. In fact, scientists have discovered that trees grow faster the older they get.

Once trees reach a certain height, they do stop getting taller. So many foresters figured that tree growth — and girth — also slowed with age.