The yogic tradition has long nurtured stories about highly advanced Yogis meditating for weeks, months, even years on end without any food or water. While these stories convey feats that are seemingly impossible according to science, the stories have persisted over thousands of years, with some retellings featuring Yogis accomplishing truly remarkable feats. But how many of those feats are simply the stuff of myth or legend, and how many of them might be actually possible? And if it is possible...