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Scoop.it!
An ice core from the Antarctic has given an NSF-funded research team a glimpse into the very distant past. The continuous core sample provides details on how the Earth's climate and atmosphere changed long ago, and gives clues about variations in ice levels. The oldest ice from the bottom of the core may be up to 100,000 years old. 
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Scoop.it!
For much of the last 250 million years the Earth has been warmer than today. Around 50 million years ago during the early Cenozoic era, the climate began to cool. A key threshold was crossed 35 million years ago and the Antarctic ice sheet began to grow – the first continental scale ice sheet in 300 million years that ultimately led to the establishment of our modern icehouse climate system. Using a combination of laboratory measurements and computer modelling to unravel the sequence of events, this project aims to understand what caused this fundamental transition of Earth’s climate from a warm “greenhouse” to relatively frigid “icehouse”.
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