Uf, drsny preklad:)
"Pilotovaná misia na Mars je kľúčová, pretože červená planéta mohla a zrejme aj bola obývaná v nedávnej minulosti."
"A manned mission to Mars is crucial because the red planet was likely habitable in the past, and scientists must find out what went wrong to prevent a similar disaster on Earth."
blx53