It has long been known that the composition of the Earth's primitive upper mantle (PUM, the Earth's mantle immediately after core formation) is distinct from that of any kind of extant meteorite.

A new study published in Science Advances by researchers from the Guangzhou Institute of Geochemistry of the Chinese Academy ...

Early Earth's evolution "Our research shows that the chemical signatures we see in the continental crust were created in Earth's earliest period—regardless of how the planet's surface was ...

And in fact, before plants appeared on Earth, scientists think there was much more carbon dioxide but no oxygen in the early atmosphere. The composition of the atmosphere has changed over time ...

Their extent of oxidation provides insights into the composition of the atmosphere at the time when they fell to Earth. In this case ~87 Million years ago. We are pioneering a new field of study that ...