Poetry. "BECOMING AN ANCESTOR carries us from the very beginning of this great clock-universe through human migrations to the bitter end, where however a horned lark is singing beside a field of silver hairgrass in winter. When this confluence produces Lucille Lang Day, who sings the world as both a family member and a scientist, and her daughters and grandchildren, they appear in the life-lines of her poems both as the homecoming of historical pilgrimages...