Pombos usam células de ferro no fígado para navegação

Um novo estudo mostra que pombos-correio dependem de células imunológicas ricas em ferro em seus fígados para detectar o campo magnético da Terra. A descoberta oferece uma nova explicação sobre como as aves navegam por longas distâncias, especialmente em condições climáticas adversas.

Pesquisadores de instituições como a Universidade de Bonn e o Instituto Max Planck de Comportamento Animal descobriram que macrófagos no fígado acumulam ferro e exibem fortes propriedades magnéticas. Essas células estão localizadas próximas a fibras nervosas, sugerindo um caminho para que os sinais magnéticos cheguem ao cérebro.

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