ahlam1399
05-24-2017, 03:23 PM
It's hard evidence that the type of spinal segmentation and numbering found in modern humans emerged 3.3 million years ago, the scientists say. The remarkable fossil was discovered in Ethiopia.
أكثر... (http://www.npr.org/sections/thetwo-way/2017/05/23/529693497/3-3-million-year-old-fossil-sheds-light-on-how-the-spine-evolved?utm_medium=RSS&utm_campaign=news)
أكثر... (http://www.npr.org/sections/thetwo-way/2017/05/23/529693497/3-3-million-year-old-fossil-sheds-light-on-how-the-spine-evolved?utm_medium=RSS&utm_campaign=news)