If Earth's history were a calendar year, humans would not appear until the last few minutes before midnight on Dec. 31. During the Proterozoic Eon—2.5 billion years to 543 million years ago ...

The world’s largest metamorphic rock oilfield has commenced production. The billion-tonne Phase I project of Bohai 26-6 started production on February 7, according to its developer, China ...

Today, rocks can function as both a carbon source and sink. "Many people, including myself, considered metamorphic decarbonation to be a background process in the recycling of carbon," Penman said.