Sixty-six antennas working together made possible the operation of ALMA Observatory.How can this telescope in the Atacama Desert see a whole part of the Cosmos that could not be seen before? In this episode, Emilio Barrios, the Array Operations Manager working at ALMA since 2008, explains why there are three antennas and how they interact with their receivers to get weak signals from the Universe.Furthermore, let's know how this revolutionary radio telescope, which allows us to see a previously unreachable part of the Cosmos, came to be due to the efforts of engineers and scientists worldwide.