isabellacoronel isabellacoronel

27-07-2016
Spanish

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avances cientificos en 1940

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cesaarm99 cesaarm99

02-08-2016

Penicilina se hizo un antibiótico
ciclotron para la investigación atómica entra en funcionamiento
la liofilizacion para los alimentos
primera vacuna contra la lepra

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