Right now we don’t have any evidence to indicate that UFOs (ie Unidentified Flying Objects) are actually alien sightings. Even so, the discussions around these phenomena have revived the eternal debate of whether we are alone in the universe or if, on the contrary, the life on our planet is a cosmic anomaly. But what do we really know about the existence (or not) of extraterrestrial life)? What kind of scientific studies have been done to try to find traces of life beyond the blue marble? And what conclusions have we obtained so far from these space investigations? «Science has been trying to answer these questions for decades but it is not until now that we begin to have the tools to answer them«, explains the astrophysicist Guillem Anglada-Escudé, from the Institut d’Estudis Espacials de Catalunya (IEEC). «The search for life on other planets has just begun«, Explain.