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Radioactivity is everywhere around us, from the atmosphere to your synthetic clothing. But why doesn't this radioactivity affect us? And how was it discovered? In this video, BBC News Brasil reporter Camilla Costa from London explains how this spontaneous emission of radiation occurs and why its discovery was one of the most important events in the history of science. And all of this was the work of Marie Curie, who would end up receiving the Nobel Prize in Physics along with her husband, Pierre Curie, and Henri Becquerel, in 1903. #bbcnewsbrasil #science #radioactivity #mariecurie Did you like it? Subscribe to the BBC News Brasil channel! And if you want to read more news, click here: https://www.bbcbrasil.com