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I lunghi viaggi nello spazio esporrebbero gli astronauti a radiazioni che accelererebbero lo sviluppo della sindrome di Alzheimer. Lo indicano esperimenti di laboratorio effettuati su topi negli Stati Uniti.
In passato era già stato posto in evidenza un nesso tra l'esposizione ai raggi cosmici e lo sviluppo di tumori.
Lo studio dell'università di Rochester pone sotto una nuova luce un'eventuale missione umana sul pianeta Marte. Se i risultati della ricerca fossero confermati, i cosmonauti riporterebbero, in un viaggio così prolungato, danni nefasti al cervello.
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