Nature World: Researchers in Antarctica suspect there are regions of the continent where ice core samples could provide climate data from as many as 1.5 million years ago, nearly doubling the look back in time afforded by the oldest ice core drilled to date.
The researchers are seeking to understand more about past climate, including a climate transition which marine sediments samples indicate took place between 1.2 million and 900,000 years ago. Presently, the oldest Antarctic ice core samples contain about...