Searching for something, finding something else and making the discovery as relevant as the objective pursued is common in science and technology. It is enough to remember some examples such as the microwave, penicillin, Teflon, vulcanized rubber or Viagra. Something similar has happened to a team from Institute of Materials Science of Madrid (ICMM), of the Higher Council for Scientific Research (CSIC), formed by Elsa Prada, Ramón Aguado and Pablo San José, in collaboration with researchers from the Institute of Science and Technology of Austria (ISTA), Catalan Institute of Nanoscience and Nanotechnology (ICN2 ) and Princeton University in the United States. They were looking for the holy grail of quantum physics: the Majorana particle, a theoretical proposal of Ettore Majorana 86 years ago in the context of elementary particle physics that still remains unproven experimentally. Finding it and mastering it in a special material that guarantees its stability, known as a topological superconductor, would be a definitive step in condensed matter physics and quantum computing. After two years of research, they believed they had found it. But a more detailed analysis revealed that the finding was a mirage. Instead, they have discovered something different, but also fundamental: an impostor particle, which imitates the behavior of Majorana, but is not.