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Modern physics is at a crossroads. Despite all the advances in understanding the Universe, there is still no simple theory that explains how everything works. A Theory of Everything. But there is one particularly attractive idea that, for some theoretical physicists, may be the right one: string theory. In this video, Elderlan Souza explains what this theory proposes and the questions that still need to be answered. Check it out: Also watch other videos on the subject: To finally understand Albert Einstein's Theory of Relativity • To finally understand the Theory of ... What is quantum physics and what is it for • What is quantum physics and what is it for ... The gravitational waves predicted by Einstein and confirmed 100 years later • The gravitational waves predicted by ... 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 #BBCNewsBrasil #Science #Physics