The human mind has always had a fascination with worlds beyond our own Following the stars across the seas, early explorers imagined that they might meet weird creatures in undiscovered lands. They never guessed that under their keels, drifting in the same currents that carried their ships, were life forms far stranger than anything they could imagine. It's a world where the forces of pressure and darkness have given rise to creatures as different as on another planet. Their whole existence is shaped by the great ocean currents, which sweep them endlessly around the biggest living space in the solar system. At the edge of this alien world, here in Florida, one ocean drifter comes from the beach itself. It can take these hatchlings three days to claw their way up from nests buried two feet deep. They may look like land animals now, but sea turtles have evolved for 80 million years to be riders of the ocean currents. These loggerhead turtles, no larger than a child's hand, are about to embark on a perilous 10-year journey around the ocean.