The winter solstice on December 21 brings us our shortest day and longest night of the year, marking the official start of winter. With the pandemic making gyms and team sports difficult, many people took up walking, running or biking to stay active. But now it’s cold and dark outside, we talk with outdoor enthusiasts about how to continue exercising safely in winter, and maybe even pick up a new sport. And we visit the "home of the world's worst weather," the Mt. Washington Observatory, to find