Within the quiet architecture of a snake egg, before muscle or mind can intervene, the embryo's body spirals rightward — not by instruction, but by geometry. Researchers at the Canadian Museum of Nature have traced this ancient choreography to a simple mechanical truth: the body grows faster than the gut, and the gut, becoming a tether, forces the lengthening form to buckle and coil. In uncovering this structural mismatch across more than 900 embryos from 39 species, scientists have found not just an answer about snakes, but a possible key to understanding how spirals arise throughout the livi