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Published online 26 November 2004 | Nature | doi:10.1038/news041122-13

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Magnetic field benefits bacteria

Weak magnetism shown to affect chemical reaction inside cells.

Can magnetic fields affect living creatures? Scientists have spent decades trying to understand how migrating birds might sense the Earth's magnetic field, but have never isolated the biochemical reactions responsible.

Others believe that the magnetic fields produced by electrical power lines might be harmful, yet no one has found convincing proof of how magnets could have a biological effect.

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