In Saturday's Health Alert, we learn how to live longer and a fun way to light up your holiday season.

Want to live longer? Get a dog.

A team of Swedish researchers tracked more than three million people with no heart disease over a 12 year period.

It turns out that dog owners had a 20 percent lower risk of dying compared to people who didn't have a dog.

The benefits were particularly strong for dog owners who lived alone - they had a 33 percent lower risk of death, and an eight percent lower risk of cardiovascular disease, like stroke and heart failure.

If you don't have a dog, have a handful of nuts. A study in the Journal of the American College of Cardiology, finds eating walnuts one or more times a week was associated with a 19 percent lower risk of cardiovascular disease and 21 percent lower risk of coronary heart disease.

People who ate peanuts or tree nuts two or more times per week had a 13 percent and 15 percent lower risk of cardiovascular disease, respectively, and a 15 percent and 23 percent, lower risk of coronary heart disease, respectively, compared to those who never consumed nuts.

Light up the season and light up the lives of those who depend on Children's National Medical Center.

A community fundraiser at the Four Seasons Hotel on December 3 features creative holiday trees, mantel pieces, wreaths and menorahs.

Everything will be on display throughout the hotel's public space from November 28 through December 20 and available to purchase at the December 3 at the event.