Prehistoric fossils discovered in China are believed to be the earliest known mammals to have lived in trees and below ground.
원문출처 : http://edition.cnn.com/2015/02/12/asia/china-fossils-early-mammals/index.html?eref=edition
원문출처 : http://edition.cnn.com/2015/02/12/asia/china-fossils-early-mammals/index.html?eref=edition