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| | Earth's magnetic field weakening - Science - MSNBC.com |
 | | Instead, the weakening, measured since 1845, could represent little more than an "excursion," or lull, in the naturally variable strength of the Earth's magnetic field, said John Tarduno of the University of Rochester. |
 | | Over the southern Atlantic Ocean, a continued weakening in the strength of the magnetic field has diminished the shielding effect it has locally in protecting the Earth from the natural radiation that bombards our planet from space, scientists said. |
 | | The weakening, if coupled with a subsequently large influx of radiation in the form of protons streaming from the sun, can also affect the chemistry of the atmosphere, said Charles Jackman of NASA's Goddard Space Flight Center. |
| msnbc.msn.com /id/3693932 (434 words) |
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