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Particle physics

Now you see them, now you don't

Evidence has been growing that the fundamental particles known as neutrinos oscillate — one type of neutrino can transform into another type. A well-placed experiment now points to the definitive answer.

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Figure 1: The KamLAND detector, in the Kamioka Mine, Japan.


Figure 2: The right place at the right time.


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Correspondence to David Wark.

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Wark, D. Now you see them, now you don't. Nature 421, 485–486 (2003).

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