Are mammals 30 million years older than previously thought?
Science: Notes & Theories blog | guardian.co.uk,
Palaeontologists re-examine a 200-million-year-old fossil from Greenland, reigniting debate about the origins of mammalsHow old…
Palaeontologists re-examine a 200-million-year-old fossil from Greenland, reigniting debate about the origins of mammalsHow old…
Palaeontologists re-examine a 200-million-year-old fossil from Greenland, reigniting debate about the origins of mammalsHow old…
封面故事:SCI诞生50年纪念、哺乳动物类群的早期分化、通过“间质-内皮转
The discovery of three squirrel-like fossils in China suggests that mammals first appeared much earlier than previously thought.