ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The intensity of the Earth's magnetic field varies with time; for example, during the period from âáá¤23,000 to âáá¤15,000 yr bp (before present) its average value may have been âáá¤50% lower than during the past 10,000 yr ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/357576a0
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