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Originally posted by the lioness,:
http://www.biomedcentral.com/1471-2229/14/17/

The genetic structure of Arabidopsis thaliana in the south-western Mediterranean range reveals a shared history between North Africa and southern Europe
Adrian C Brennan1, B

Conclusions
The patterns of genetic diversity and structure of A. thaliana in Morocco show that North Africa is part of the species native range and support the occurrence of a glacial refugium in the Atlas Mountains. In addition, the identification of a genetic lineage specific of Morocco and the Iberian Peninsula indicates that the Strait of Gibraltar has been an A. thaliana migration route between Europe and Africa. Finally, the genetic relationship between Morocco and Asia suggests another migration route connecting north-western Africa and Asia.

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Cool,

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But perhaps the most well-studied example of animal magnetoreception is the case of migratory birds (e.g. European robins (Erithacus rubecula), silvereyes (Zosterops l. lateralis), garden warblers (Sylvia borin)), who use the earth's magnetic field, as well as a variety of other environmental cues, to find their way during migration.

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http://www.ks.uiuc.edu/Research/cryptochrome/

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But more importantly, our results show that all birds would stop over for several weeks before crossing the Mediterranean Sea

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