Who knows. Maybe they actually were there, hidden as a "seed"... and we missed them.
(I remember the creators of Futurama pulled off similar tricks in two key scenes fairly early on in the show - one of them right in the very first episode, in fact. Thank goodness they were able to go back in the fourth season and see those seeds blossom...)
(I remember the creators of Futurama pulled off similar tricks in two key scenes fairly early on in the show - one of them right in the very first episode, in fact. Thank goodness they were able to go back in the fourth season and see those seeds blossom...)