For more than 150 years, researchers have been studying the fossils of bird-like dinosaur Archaeopteryx and attempting to answer this question: Did it fly?
원문출처 : https://www.cnn.com/2018/03/13/world/flying-dinosaur-archaeopteryx/index.html
원문출처 : https://www.cnn.com/2018/03/13/world/flying-dinosaur-archaeopteryx/index.html