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Technology
Time for virtual nuclear tests?
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‘Many ways’ to kill off chemical weapons
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Harmful rays hit southern city
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Panel hears conflicting views on biology of violence
News
US keeps tight rein on Russian satellite launches
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Look to salt caves for secret nuclear tests
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Gulf War was no high-tech breakthrough
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US generals take aim at spy satellites
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Atmospheric ozone hits a new low
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Mission to Mars comes down to Earth
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Cable TV company plans fibre-optic data network
News
Clinton pledges ‘science for democracy’
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