The bathysphere—bathys is Greek for "deep"—was developed in the early 1930s by William Beebe and Otis Barton, two explorers from the New York Zoological Society. It was a 4,500-pound hollow ...

In 1971, the Harbor Branch Oceanographic Institution in Fort Pierce, Florida built this nine-ton, 23-foot long acrylic and aluminum submersible for marine science research. Its applications ...