Many years ago, the physicist Enrico Fermi asked that, given the fact that our universe has been around for a very long time and we expect that there are many planets within it, we should have found evidence for alien life by now.
Dawno temu, fizyk Enrico Fermi, zapytał, skoro nasz wszechświat  istnieje bardzo długo i oczekujemy, że zawiera wiele planet, powinniśmy już znaleźć dowód na istnienie obcych.