The undersea world and its marvelous life had been exposed by Barton and Beebe. But the ocean was far deeper than the level to which the two men had descended.
One problem that prevented them from exploring deeper was the length of the steel cable that connected them to the surface. A Swiss scientist, Auguste Piccard, designed a craft called a bathyscaphe.
Like a submarine, it could float free of any ship, but it was designed to withstand the crushing water pressure