Thousands of years ago, hunter-gatherers took the remains of ostrich eggshells and made them into decorative beads. But researchers found them in areas where ostriches never lived, sparking the question of how they got there. The beads tell a story of gift exchanges over great distances -- an early social network 30,000 years ago.


원문출처 : https://www.cnn.com/2020/03/10/world/ancient-ostrich-eggshell-beads-scn/index.html