Once used to sneak up on enemy warships undetected, submarines of today help to open up an entire untouched underwater world deep below the surface. From WWII's oxygen-hungry diesel subs to the modern marvels like USS Nautilus, propelled by silent nuclear power, witness the evolution of underwater travel. Thanks to evolutions in submersible designs and technology, the submarines of today are much more than wicked war machines. Modern day subs are capable of carrying entire cities on their backs, breaking mega blocks of ice and touching down at the deepest, darkest points of our oceans. As drones redefine underwater exploration, meet the autonomous Orca and decode its communication systems. Explore how submarines silently patrol with unmatched technology, revolutionizing the aquatic domain.