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Here's another one (not sure if this one's solved yet, either) ..
Apparently, in the near infrared spectrum, the refractive index of water can be affected by a strong magnetic field. They reckon the field somehow strengthens the hydrogen bonds but the exact mechanism was a mystery (in 2004).
Because water is diamagnetic, it shouldn't be effected by the field. They suspected a Lorentz force may have been responsible for strengthening the bonds .. which also results in an increase in the melting point.
Interesting again..
Cheers
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