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In this talk, Beatriz Gato, from the Institute of Fundamental Physics (IFF CSIC), reviews antimatter, dark matter and dark energy, the exotic and mysterious side of the universe. We will see what they consist of, how they were discovered, what their properties are, and how much they contribute to the total matter and energy of the Universe. We will also explain how we could detect antistars (if they exist) and what the matter-antimatter asymmetry problem consists of. In addition, we will describe the experiments that are carried out to create and analyze anti-atoms, and we will see the uses that are made of antimatter in our society, in hospitals as well as in industry and in the area of Materials Science and Technology. This conference is part of the IFT's 'The New Era of Fundamental Physics' cycle at the Residencia de Estudiantes, held on the occasion of Science Week 2023. #FundamentalPhysics #FundamentalPhysicsConferences Production and image credit: Residencia de Estudiantes CSIC. Date of the talk: November 7, 2023. Don't miss any video: just... SUBSCRIBE! It's FREE!: / @iftmadrid Follow us on TWITTER! / ift_uam_csic INSTAGRAM! / ift_madrid Also on FACEBOOK! / iftmadrid We are now on TIK TOK! / ift_uam_csic And check out our website! https://www.ift.uam-csic.es