>b) An advanced, spacefaring race (or races) travel to Earth and spend over 70 years pulling pranks on military pilots. 70years might not be that long for them

>b) An advanced, spacefaring race (or races) travel to Earth and spend over 70 years pulling pranks on military pilots. 70years might not be that long for them if they are on mission across galaxies, they are operating on different timeframes.