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Mammals Shrank in Size During Two Extreme Climate Events


Researchers announced this past week that mammals got smaller in size during two extreme climatic events that occurred some 50 million years ago.  We'll talk with the leader of the study that outlines these findings. Also… India's space program made a major leap this past week when it launched an unmanned probe to Mars… The World Meteorological Organization said this week that the amount of greenhouse gases in the atmosphere reached a record high in 2012. Researchers in California are putting together an international database of brain images from hundreds of chronic pain patients. A US and a Swiss group have published a new report of the world's worst polluted places and the factors that led to them. 

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