Snake evolution has intrigued scientists for years because they knew that these complex vertebrates once had limbs and adapted over time to live without them in dramatic fashion.
원문출처 : https://www.cnn.com/2019/11/20/world/snake-evolution-hindlimbs-scn/index.html
원문출처 : https://www.cnn.com/2019/11/20/world/snake-evolution-hindlimbs-scn/index.html