Meghan Newcomer, MS ’16, took a week off last January to fly around the world, but it wasn’t what you’d call a vacation. The Weill Cornell Medicine-trained physician assistant ran the 2018 World Marathon Challenge: seven 26.2-mile races in seven days on seven continents. And she came in second among the field of a dozen women—even winning one of the races, the South American leg in Cartagena, Colombia. “It was definitely a...