The seas, which cover more than 70% of the Earth's surface, influence our climate and harbour rich mineral deposits and valuable food sources. Oceanographers are only gradually beginning to understand ocean currents, deep sea ecosystems and the geological structures of the ocean floor. Because of the extreme conditions far below the water surface, none of this would be possible without advanced technology. Search for deep sea fish with spotlights, control an underwater robot, and join the crew of a diving submarine: The Oceanography exhibition shows the technology that helps researchers working in extreme conditions far below the ocean surface.