MAGNETORECEPTION: Birds, brains and magnetic fields

“We can only see the universe,” wrote Einstein, “by the impressions of our senses reflecting indirectly the things of reality.” Our senses are the interface between ourselves and our environment; they mark the boundary between our
inside and our outside world. The progress of science has to some extent been the progress of artificial sense organs
– the invention of telescopes and microscopes, lenses that outstrip our eyes, membranes that magnify vibrations
beyond the capacity of our ears. But what if this progress identifies more than the five senses we are accustomed to:
touch, sight, hearing, smell and taste?

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