When Al and Tipper Gore announced their divorce in 2010 after 40 years of marriage, they did more than shock most Americans. They also sparked new research out of Ohio's Bowling Green State University into the state of marital union among older couples. Mr. Gore might be a poster boy for environmentalism, but his split at age 62 (she was 61) has also made him a symbol of so-called "grey divorce".
Grey divorce: How to protect your nest egg
