179- Bathysphere

In 1860, a chance find at sea forever changed our understanding of marine habitats, sparking an unprecedented push to explore a new world of possibilities far below the surface of our planet's oceans. Deep sea life, previously thought possible down to a maximum depth of 1,800 feet, was found in the form of creatures attached to a transatlantic telegraph cable. Raised for repair from its resting place some 6,000 feet down on the ocean floor, the line was covered with marine species. This paradigm-shifting revelation sparked the public's imagination, fueled global scientific research and propelled the eventual development of new submarine vessels, including the record-breaking Bathysphere.