english: This is used in reference to a report in 2007 by the National Research Council in the United States, wherein they tried to understand how we can look for life elsewhere in the universe, okay, especially if that life is very different from life on Earth. If we went to another planet and we thought there might be life there, how could we even recognize it as life?
non_english: Izraz je korišćen 2007. u izveštaju Nacionalnog istraživačkog saveta u Sjedinjenim Državama, kada su pokušali da shvate kako bismo mogli da tražimo život na drugim mestima u univerzumu, naročito ako je taj život veoma različit od života na Zemlji. Ukoliko bismo otišli na drugu planetu i mislimo da tamo možda postoji život, kako mi uopšte možemo prepoznati to kao život?