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A new theory developed by Prof Gerrit van der Laan, from the Science & Technology Facilities Council (STFC) and Diamond Light Source, and published this week in the journal Physical Review Letters, provides a powerful sum rule that scientists can use to explore the properties of novel materials, such as those used for spintronics devices.

By Christopher Le Coq BRUSSELS (Reuters) - The European Union should halt the rapid extinction of plant and animal species by 2020 because it will cost less than trying to repair the damage once it is done, Europe's environment chief said on Tuesday. [More]