When she decided to start running in an attempt to keep up with coworkers who played basketball on their lunch break, her ...

An energetic 6-year-old chihuahua named Jellybean has already conquered six marathons alongside her owner, Andrew Owens, and is now setting her sights on a new world record in the new year.

"Ten to 20 years ago, that sort of distance was really mainly run by people over 40… because it takes a lot of maturity to be that dedicated to your training," she said. "Now though, this trend ...