The Science of Relationships

The secret to a good marriage might simply be to love the one you're with. And there are even loads of science to back that up.

In her new book, "For Better: the Science of a Good Marriage," author and health journalist Tara Parker-Pope applies rigorous research to the big things in a relationship -- sex, money, kids, fighting -- and more interestingly to the(seemingly) small things -- housework, snoring, eye rolling, even the way couples retell the story of how they met.

Turns out marriage isn't quite what most of us probably think it is: Wed couples are actually having more sex than anyone, conflict can be a good thing and more than 50 percent of us are staying married.