The world's oldest mammal has been identified using fossil dental records -- predating the previously confirmed earliest mammal by about 20 million years -- in a new discovery hailed as "very significant" by researchers.
원문출처 : https://www.cnn.com/2022/09/06/world/earliest-mammal-teeth-scn-scli-intl/index.html
원문출처 : https://www.cnn.com/2022/09/06/world/earliest-mammal-teeth-scn-scli-intl/index.html