Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Passage: Brachytherapy inodzokera shure kuna 1901 (chinguva chiduku pashure pokuwanwa kworadioactivity naHenri Becquerel muna 1896) apo Pierre Curie akakarakadza kuna Henri-Alexandre Danlos kuti manyuko anoradioactive aigona kupinzwa mutumba.  Mubvunzo: Ndiani akawana radioactivity?
Henri Becquerel