All claims of extraterrestrial life must pass these 7 hurdles

All claims of extraterrestrial life must pass these 7 hurdles

The grandest cosmic question remains unanswered: “Are we alone?“ This depiction of an Earth-like exoplanet showcases a rocky world with a thin atmosphere in its parent star’s habitable zone. It has oceans and continents and clouds, and could possess macroscopic life forms on its surface. At a distance of multiple light-years away, it would take a gargantuan telescope to image them, and it would only be able to see the world as it was in the dis…