NEGATIVE RESULTS are rarely reported widely. But they can be important. And this week sees one such--the possible demolition of what had been thought to be a sign of dark matter. Twenty years ago results from DAMA, a particle detector housed under a central-Italian mountain, suggested that this mysterious stuff, thought to make up 85% of all matter in the universe, had been detected. DAMA's operators saw an oscillating signal, peaking in June and at its lowest ebb in December, which was consiste...
NEGATIVE RESULTS are rarely reported widely. But they can be important. And this week sees one such--the possible demolition of what had been thought to be a sign of dark matter. Twenty years ago results from DAMA, a particle detector housed under a central-Italian mountain, suggested that this mysterious stuff, thought to make up 85% of all matter in the universe, had been detected. DAMA's operators saw an oscillating signal, peaking in June and at its lowest ebb in December, which was consiste...
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