BAKU, Azerbaijan (AP) — Even as Earth sets new heat records ... of the main heat-trapping gas into the atmosphere. It’s a 0.8 ...

A series of rocks hiding around Colorado's Rocky Mountains may hold clues to a frigid period in Earth's past when glaciers several miles thick covered the entire planet.

Around 700 million years ago, the Earth cooled so much that scientists believe massive ice sheets encased the entire planet ...