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Ghostbusting machines

Physicists have built many instruments to detect neutrinos. Maybe all those Nobel Prizes won by previous neutrino researchers have something to do with it.
It seems like a law of nature — the tinier the bit of matter you want to capture, the bigger the apparatus has to be. True or not — and exceptions abound — neutrino detectors have often weighed in at the more massive end of the scale. Most neutrino detectors work by looking for a burst of Cerenkov (cherr-YENK-off) radiation as the signal that a neutrino has zinged through the instrument. Cerenkov radiation is an eerie, bluish light emitted when a particle travels through water...

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