They crossed a land bridge:
don't kid yourself...we were left here by space aliens to get fattened up for future harvesting... haven't you ever been to a walmart...we are
ripe for the picking...
as soon as the television signal of that one show with mama june reaches them
WHAMMY he comes the intergalactic space truckers to haul us off to the slaughterhouse... then it's...
Zargbargs House of Meat... we're right off the rest area exit ramp next to the space truck stop... WE'VE GOT LOW LOW PRICES....AND A SPECIAL SALE ON TALKING MONKEY MEAT....so fresh it's still screaming.... mmmmmmm