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Chile is appealing for international help as it copes with the double disasters of a fierce earthquake quickly followed by a devastating tsunami.
Weighing their impact on climate change, scientists say that whale populations in the ocean should be preserved as a carbon sink just like forests on dry land.
Tens of thousands gathered in Rome on Saturday to protest Prime Minister Berlusconi's alleged corruption while a case against him and his tax lawyer has adjourned.
The Middle East's poorest country, Yemen, already spends a third of its families' income on fresh water, which is predicted to become too expensive to consume by 2017.
Rather than eggs, which can sometimes be in short supply, researchers have found that tobacco plants can be used to incubate diseases before they are killed and turned into vaccines.
After losing his voice to cancer, new software is allowing Roger Ebert to "speak" through a computer by taking sounds of his own voice from his DVD commentary on 'Casablanca' and 'Citizen Kane'.