Rightnow,therearemillionsoflivingthingsonyourhands,intheairyoubreathe,andinthesoiloutside.Youcannotseeasingleoneofthem,becausetheyarefartoosmall.Thesetinylivingthingsarecalledmicroorganisms,ormicrobesforshort.Toseethem,youneedamicroscope,atoolthatuseslensestomaketinythingslookhundredsoftimesbigger.
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