Is life found at all depths in the ocean?
question was settled in 1960, when Piccard and Walsh reported
a swimming animal, resembling a sole or other flatfish about
a foot long, at 35,800 feet deep, observed from a porthole
of the bathyscapne Trieste. Some scientists believed, as recently
as 1860, that marine life could not exist below 1,800 feet.
That view was altered when a telegraph cable laid in the ocean bottom at 6,000 feet deep was retrieved and found covered
with many forms of marine life.