A new study published in National Science Review examines China's trends in primary particulate matter (PM) emissions from ...

C hondritic meteorites (chondrites) are some of the oldest rocks in our solar system, forming 4.5 billion years ago. Therefore, their primitive composition means that they offer a window into the ...

Dr Mario Fischer-Gödde and his colleagues say the killer rock was a huge carbonaceous chondrite (C-type) asteroid, a ...