are the ones that can roll with the changes. >> it was the moment of his life, i get, that he thought, well, that is very special here. what's going on. >> yeah. these creatures change their beaks or their shells, depending on their food source or their predators. >> absolutely. and especially on an island, it seems to be more, more dramatic. >> speaking of dramatic, next port of call is fer nan dena. we have to dig our biosecure clothing out of quarantine for this one. because landing here is very, very rare. even the galapagos national park rangers aren't allowed on these prehistoric rocks.