An international team led by Dr. Tetsuto Miyashita published a study in the journal Current Biology explaining why snake embryos coil into a right-handed spiral. ^[1] Dr. Tetsuto Miyashita, senior author and evolutionary biologist at the Canadian Museum of Nature, explained that the spiral forms as the embryo's body rapidly lengthens while its gut acts as a tether, causing the growing body to buckle and twist into a right-handed coil. ^[2] Dr. Raul Diaz from California State University Los Angeles used CT scans to reveal a previously unseen pillar of gut stretching through the spiral of coiling snake embryos. ^[3] Dr. Tetsuto Miyashita, an evolutionary biologist at the Canadian Museum of Nature, stated that snake embryos coil right-handed because their long bodies grow while tethered by the gut. ^[4] Lead author Alexandra Weber, a graduate student in zoology at the University of British Columbia, stated that during the first several weeks after eggs are laid, embryos coil only dextrally (to the right) because they lack muscles to move actively. ^[5] Lead author Alexandra Weber, a graduate student at the University of British Columbia, explained that embryos coil right-handed initially because they lack muscles to move with, so different forces make them coil that way. ^[6]