Around 25,000 years ago, hunter-gatherers used the bones from 60 mammoths to build a large circular structure in Russia.
원문출처 : https://www.cnn.com/2020/03/16/world/ice-age-mammoth-house-russia-scn/index.html
원문출처 : https://www.cnn.com/2020/03/16/world/ice-age-mammoth-house-russia-scn/index.html