On an October day in 2015, ecologist Meredith Root-Bernstein was watching a family of rare pigs at a Parisian zoo when something caught her eye. Intrigued, the scientist returned to the menagerie at ...

Of all the kinds of gear runners can nerd out over, one of the most essential is a good running watch. A top-notch fitness tracker can supercharge your training, with features that help you work on ...