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Nature 445, 577 (8 February 2007) | doi:10.1038/445577a; Published online 7 February 2007

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Trials halt after gel found to increase HIV risk
Cloners take different views over best recipe
Japanese nets threaten grey whale's survival
Campaigning for open access gets easier
Demolition looms for 'landmark' Bevatron
Academic starts hunger strike for tenure at MIT