A robot explores the dark, cold, deep sea floor of the South Atlantic, transmitting images of vibrant coral and fish never seen before as scientists give live commentary via YouTube. And Argentines can't get enough of it.
The Argentine-American scientific mission is for the first time exploring the Mar del Plata canyon, a submarine gorge which plunges nearly 4,000 meters (13,000 feet) deep, off the coast of the seaside resort of the same name.
