Massive Native American drawings -- which remained unseen in an Alabama cave for more than 1,000 years -- have been unveiled by a team of scientists. It's the largest known cave art ever discovered in North America.
원문출처 : https://www.cnn.com/style/article/largest-native-american-cave-art-scn/index.html
원문출처 : https://www.cnn.com/style/article/largest-native-american-cave-art-scn/index.html