The disappearance of the ivory-billed woodpecker gets Hannah Anderson thinking about how we make room to care for other creatures on this planet, and the hope of Christmas in dark times. Part of a Constant Wonder series marking the Christian Advent with daily vignettes that distill the spirit of the season, in keeping with our mission of exploring wonder and awe in all nature, human or wild, vast or small: encounters that move us beyond words. Guest: Hannah Anderson, author of "Heaven and Nature Sing: 25 Advent Reflections to Bring Joy to the World"