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Old 07-10-10, 08:21 AM   #1
pohlf
Accidental Vintage Rider
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Some birds "see" the earth's magnetic field..

I thought this was pretty interesting. Think of the grams they save by tossing their compasses on cross-country flights.

http://blogs.discovermagazine.com/no...sion-is-sharp/

Gleaned from DKOS weekly science article roundup.

Last edited by pohlf; 07-10-10 at 08:21 AM. Reason: tie-poh
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