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All fired up over world's biggest X-ray laser gun PARIS • A sleek, subterranean X-ray laser set to be unveiled in Germany today, the most powerful in the world yet, has scientists in a dozen fields jostling to train its mighty beam on their projects.
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Clues to why leaves come in many sizes The huge variety of leaves in the plant kingdom has long been a source of wonder and fascination. The leaves of a banana plant, for instance, are about a million times bigger than the leaves of heather.
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