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Let us begin with a conceit. Imagine a drop of rain falling at the very
center of the Continental Divide. Just before it reaches the ground a puff of
air carries it to the Eastern slope. As it strikes the ground it dislodges a
small stone which tumbles down the face of a cliff landing in a rivulet which
winds its way down the mountain side joining with other freshets of water until
the rivulets become streams and the streams become a river which leads to a bay
which leads to a semi-enclosed sea which opens into the world ocean. Let us
follow this stone, soon to be a pebble, as it makes its way to the coastal
zone, the continental shelf, the abyss. Let us, similarly, follow the drop of
water on its journey to the sea.
If we intercept the stone at the beginning of its journey we shall have
no trouble for we can mark it with a radioactive tag that scintillates
throughout its journey. Scientists and engineers will then tell us how to
locate a coordinate system at the center of gravity of the pebble so that, as a
function of time, we can track the location of the center of this co-ordinate
system on maps of the region. We need not be concerned should the stone be
abraded or rounded with time and become a pebble during the course of its
journey for the coordinate system will shift ever so slightly. Its relocation
can for all intents and purposes be neglected. We can now relate the rotation,
nutation, wobble, translation. position, abrasion, chemical modification,
coloration and resource potential of this bit of solid matter to the physical
characteristics of the environment to which it is exposed.
True enough, each pebble will have its own story but, on the average,
each will tumble down the mountain side, be washed by rain and transported by
rivulets until it is picked up by the rushing waters of some rocky mountain
stream of the Eastern slope. Gravity, supplemented by hydraulic force will be
the primary mechanism that tumbles the pebble down rocky gorges until it comes
to rest in some quiescent pool. There it lies until the force of rushing water
from a mountain storm or a sudden thaw lifts it from the stream bed and carries
it down to more steadily flowing rivers - the Arkansas, the North Platte, the
Rio Grande, the Powder. These rivers in turn will find their way to the Gulf or
to the great meandering muddy Missouri and finally to that mother of waters the
Mississippi. Here the pebble, now reduced to the size of a large grain of sand
will, on occasion be trapped in the center of an oxbow meander in the river.
Here it may lie for a decade or more until some great spring flood cuts a path
across the oxbow scouring through previously deposited banks, reestablishing
the movement of the sediment in an endless march to the bayous and the deltas
of the Gulf. All this we can follow with ease, in a deterministic manner, fully
explainable by the laws of gravity and the hydrodynamic pressures of flowing
water.
But what of our drop of water?
From the very moment of contact our water drop has splashed into a
myriad of components. The scientist who catches the drop for a moment will find
little value in identifying its center of gravity or tagging its component
molecules with a nuclear tag. As soon as it is released the drop loses its
identity. Evanescent and mercurial the drop vanishes and its individual
molecules go their separate ways. Some will become water vapor and return to
the atmosphere, some will seep into the soil and form part of the water table,
some will be taken up by plants to be joined with carbon and hydrogen and
phosphorus and nitrogen to form the molecules of life, some will, like the
pebble, find their way into the mountain streams. Some molecules of water vapor
will rejoin the mountain as falling snow, or rejoin the river as melt from the
snow pack. Thus the notion that we can follow the drop of water as we follow
the journey of the pebble is truly a conceit that bears little relation to
reality and provides little basis for analogy. When earth oriented mortals
adopt such a conceit as valid metaphor it becomes a deceit which induces human
kind to; drown when they could breathe, to sink when they could swim, to spill
oil when they could capture it, to be buffeted by the free surface when safety
resides a few feet below and to regard the worlds most benign, supportive and
loving environment as the cruel sea.
Scientists, called hydrodynamicists, who grapple with the problems of
tracking the elusive drop soon learn to stand in one location and watch the
water flow by. Employing a co-ordinate system that is fixed in space one can
watch the residual molecules of water from many raindrops pass by and one can
describe the average behavior of this water as though it were a homogenous
continuous media as it enters and leaves the coordinate system. One can stand
on the bank of a stream or a river and watch the behavior of water as it enters
and leaves that cross section of a defined channel. Most of all, one can watch
a floating object or suspended pebble enter and leave the cross section with
its memory of past history dictated by gravity and flowing water. It leaves
with a new set of directions and anticipations for its future. The mathematical
language which describes the movement of solid objects is thus completely
different from the mathematical language that describes the behavior of water.
In an object oriented, earth oriented society, hydrodynamicists,
aerodynamicists and meteorologists are rare creatures, lonely and
misunderstood.
Other scientist called oceanographers grapple with other physical
properties of the ocean. Of course many hydrodynamicists are oceanographers but
very few oceanographers are so abstruse and so divorced from the metaphors and
understandings of solid earth as to deserve the title hydrodynamicist. These
scientists also discover that the physical properties of the watery world are
as different from the physical properties of the land as we might expect to
find in a distant and yet unknown planet that has that property that we call
'life'. We yearn for the existence of that unknown planet and our space
directed society spends billions in an elusive search for that mythical
'erewhon'. Our earth bound fantasy is that an examination of some unique and
different form of life and living will yield an understanding of our own. We
need not fantasize for we have that unknown planet surrounding us and
enveloping us on every oceanic shore. Yet our explorations of the sea are
minimal, and our understanding of this watery planet and life in its unbounded
sea are at best metaphorical.
Is this not surprising, for we are the evolutionary development of
creatures who lived entirely in the ocean and each of us spent the first nine
months of our twentieth century life fully submerged in an amniotic bath
breathing fluids as our ancestors did millions of years ago. We do perceive
that the world of water is different from the world of the earth, but our
perception is asymmetrical. We all regard it as a miracle to "walk on
water" but most would regard it an oxymoron construct to "swim on
land". Why this asymmetry?
Perhaps we can gain understanding by the deconstruction of another
conceit. Let us deconstruct the notion that all humans are land mammals whose
evolution from the sea is so remote that reminders of this historical past are
at best vestigial. let us postulate instead that there are two species of
humans as land mammals and humans as marine mammals. How can we identify these
two species? Readers of this text will soon learn that the author will adopt
the methods and modalities of any science, religion or dogma which will provide
insight. Thus we shall identify these two species as a logical positivist would
identify, through the use of operational definition. On this basis one need
only ask a human whether he or she feels safer, more comfortable and/or more at
home living in a habitat on the solid earth or living in the marine
environment. We have identified these marine creatures as "Children of the
Ocean". Many or the students in this seminar qualify an many do not but
but we will not associate positive of negative value judgements with respect
to these fine specimens of humanity, but we shall soon see that "Children of th Ocean"
do indeed possess all of the
physical and psychological characteristics that we associate with marine
mammals and we shall also see that they are fully justified by the physical
characteristics of the ocean to regard it as a safer and more beneficent world
than that of the land and far more conducive to survival of the individual and
the species.
Of a certainty all humans spend the first nine months of existence as
marine mammals. Immersed in an amniotic fluid that has the salinity
characteristics of sea water of millions of years ago, the embryonic lungs,
oral and nasal cavities are flooded and oxygen is carried into the blood stream
through the umbilical chord of the mother. This blood also collects the carbon
dioxide generated by the infants metabolism and it is carried back to the
mother for human dialysis. Many modern mothers are now choosing birth immersed
in a warm bath of Ringers solution (isotonic with blood) or other fluid as the
safest environment in which to dewater the lung without displacement of the
surfactant fluid and thus transfer life support from the umbilical to the
breathing of air. This is the process by which all most marine mammals give
birth and, of course, marine mammals are air breathers and cannot remain
submerged for periods of time which are long compared with timely needs for
oxygen supply or carbon dioxide removal.
At birth the aided infant can easily keep its head above water and if
intermittently immersed during the waking hours will be able to swim at the age
of two to three months. Thus adaptation to life as a marine mammal is virtually
instantaneous. Compare this with the long process that is required for
adaptation to living on land. It takes about a year before the infant learns
how to toddle and more years before the child can run and jump and climb with
fear of injury. During this period of time most land oriented parents must
maintain continuous watch over the infant. For many, if not most, their worst
fear is that of drowning in the pool. But that is because the have deprogrammed
their infant with respect to swimming. As we shall later learn parents in
neolithic times (a few thousand years B.C) would place a vine tether on their
infants and drop them into the water for safekeeping. Were they irrational?
Were it modern times they would have at least protected their infant
from automotive vehicles. Indeed more people are killed driving to the beach
than die by drowning in the water. But there are more fundamental hazards on
land which must be avoided. it is very difficult to sustain fire in the water,
one cannot fall in the water, one can fall from a great height into the water
without harm but on land a fall from trivial heights can produce permanent
injury or death. One cannot be exposed to freezing temperatures or suffer frost
bite in the water, nor can one be sunburned or suffer heat stroke. True enough
unprotected immersion in cold water can induce hypothermia in short time, but
that is equally true for the human who ventures into sub-zero cold in the
winter without protective clothing.
The advantages of adapting to a water environment vice a land
environment are legion and are perhaps best understood if we ask what the world
would be like if the human mammal had never left the sea. Let us then
reconstruct the human with the assumption that he/she had never evolved out of
the sea and that the high technology society that we enjoy today had been
developed within the ocean planet. Let us further imagine that this society is
now prepared to explore and exploit the land as we are now preparing to explore
and exploit the ocean.
It takes little imagination to envision that this society would have a
Messiah who could swim on land. It takes a bit more to recognize that the wheel
would have been an invention of modern times and would have been of little use
except as a curiosity to primitive peoples. Why not the wheel? The wheel was
invented to move large objects with minimal friction. In the world of water,
how absurd. A child can move an ocean liner in the water as long as it floats
above the bottom. Without an anchor, structures as large as the World Trade
Center will be carried by the smallest wind or current and could, in theory,
wander across the face of the globe. Other differences will immediately spring
to the readers mind but this construct is best examined in a more structured
manner.
Before we examine this unique spectrum of constructs we should first
ask if we can bionically reconstruct the earth oriented human to be a creature
that can survive as a free swimmer in the deepest parts of the sea. The answer
is surprisingly simple. We need only flood the lungs and oral and nasal
cavities with an oxygen rich saline fluid which has the salinity
characteristics of blood. We are now left with a creature that is, like most
marine animals, free flooded. That is, the entire body now has the
characteristic of an assemblage of membranes and fluids incapable of sustaining
substantial pressure differences within its envelope and at all times being
exposed internally and externally to the ambient pressure of the sea. The
electrochemical thermodynamic machine that is the human is fully preserved. The
body fluids and electrolytes permit the full operation of the neural system,
the brain, the sensory functions and the neuro-motor system scarcely
distinguishable from its operation in the earths atmosphere. As long as oxygen
is pumped into the fluids filling the lungs this vital oxidizer which burns the
fuels of life will sustain the thermodynamic machine. This human will be able
to swim in the ocean and make great excursions in depth without fear of fatal
accidents called bends or air embolisms. We know this to be true for the
scientists at Duke University have carried out successful experiments with mice
and men that, in their totality, demonstrate this capability.
True enough this magical and virtually unbelievable capability will
limited in duration to about one half hour due to the inability of the body to
eliminate the carbon dioxide product of internal combustion This will be true
unless the blood is shunted to and through an external CO2 dialysis machine.
Such a submersible bionic adjunct is on the drawing boards but we will leave
these speculations to the cyberpunk literature of "brave new worlds".
For our part these appreciations of the oceanic capabilities of the
deconstructed earth mortal permit us to reconstruct our hypothetical sea
adapted creature.
Let us now explore this in terms of the modifications that would be
required to permit us to return to the sea. The changes are small. The primary
essential modification would be the redevelopment of a gill. We know where it
would be located for vestigial indications of a gill appear in the early stages
of development of the human embryo. We should also recognize that our blood and
other body fluids have salinity characteristics which matched the ocean
salinity of millions of years ago. Our reconstructed creature would have
obviously adapted to the biochemistry of the current oceanic biosphere.
Other changes would be less significant. Legs as we know them would
have useless features but would be adequate. Toes would be as useless to the
underwater denizen as they are to us but, as we know. it would be nice to have
flipper like feet. Arms would be of limited use for propulsion, but, as the
lobster has shown us, arms and hands with claw like capabilities would be very
useful. Eyes, ears, mouths, vocal folds, though flooded, would be very useful,
but we could easily get rid of that aesthetically ungainly appendage, the
protruding nose.
A few of the immediate advantages which accrue to the free-flooded
human are freedom from those dread hazards which we associate with deep sea
diving, air embolism and the bends. When the lungs and tissues of an underwater
creature are filled with gas then depth changes must be made slowly and with
care to give time for the gases to decompress and to escape without rupturing
vital tissues. But experiments with freely flooded mice have shown that rapid
changes in depth over many thousand feet can take place with great rapidity and
without physiological effect.
There are many human hazards of the land that are not experienced in
the sea. One cannot stumble or fall in the water column. Oh what problems we
land creatures have with walking and running and stumbling and falling. Our
infants require three years or so before they master the skills of jumping and
running and walking but the skill of swimming comes with birth and can be
retained by reinforcement at the age of three months. The most moderate of
injuries to the legs and feet will impair our ability to walk and severe injury
will confine the human to crutches or the wheel chair for a lifetime. All that
is needed for swimming is an arm or a leg or something which can pass as a
flipper.
Coupled with the absence of ambulatory hazard is a new found mobility.
As neutrally buoyant creatures, underwater humans will easily occupy the full
oceanic space. Swimming speeds will indeed be less than walking or running
speeds but slight adjustments in density will permit the inhabitants to
effortlessly rise or sink many thousands of feet in the full water column.
Three dimensional space is their habitat and they will most likely have a
psychological aversion to solid boundaries, the seabed, the ocean surface, or
shallow water. Are these not the ocean boundaries to which the land lubber
foolishly clings?.
Will there be speech? Of course, but the nature of human communication
will be dramatically altered by the difference between the physics of sound in
the air and the water. It may not be the dramatic difference in the velocity of
the sound but in the large difference in the transmission characteristics of
vocal production at different frequencies. In the water high frequency sounds
have much information content but do not travel very far. Low frequency sounds
travel long distances. Will there be two languages, a high frequency language
for conversation and socialization and crisis management and a low frequency
language for communication between societies and long range warning of
impending danger?. The reception of sound will not be dissimilar to auditory
reception in air except for the greater distortion of the signal with distance.
Direction finding will require the underwater creatures to have ears with large
pinnas as the difference in time of arrival of the direct sound and the
reflection of the ear lobe matches the synapse response times required for this
sophisticated neurological process.
Touch, taste, smell. No problem except for the dominance of salt.
Sight? A world apart. Six hundred feet below the surface of the sea photons are
virtually non existent. Even at the surface the ocean is optically opaque for
distances greater than 100 feet or so. Will these underwater creatures be
blind? Hardly, for there is bio luminescence in the deep and the need for
sensitive sight when the world is dark is much greater than for a world that is
brilliantly lit.
And what of creature comfort, is the ocean really cold and dark. Dark,
yes but the ocean is quite isothermal with minimum temperatures above freezing
at about 4o Celsius and maximum temperatures of about 27o Celsius. Oh what
problems we land creatures have with freezing in wind chills of minus 50o
Celsius or with sunburn and sunstroke and heat prostration. It is true, as you
will say, that the naked human cannot long survive in arctic water but it is
equally true that the naked human cannot survive the winter in the streets of
Minneapolis. Our underwater denizens will, of course, have wet suits with all
the modesty and style of Cardin or Gucci and no rational human will swim below the
tropic's thermal layer or in the northern climes without proper attire. What a
joy to be mobile in one's environment in comfort and style every season of the
year.
Yes, there are predators. But is the Great White Shark more fearsome or
more ubiquitous than the Man eating tiger? Is the sting of the Scorpion fish
more venomous than the sting of the Scorpion? Is the jelly fish more fearsome
than the wasp or the bee? Is anything in the ocean environment as fearsome as
the drunken driver in a motor car?
What about the hazards of nature? We all think of the violence of
storms at sea but few realize that some sixty to one hundred feet below the
effects of the free surface are negligible. The underwater society will stay
away from the free surface whenever the wind and the waves are high, avoiding
the fury of the hurricane or the cyclone or tornado. The fierce tsunami which
inundates the land is unknown in the deep ocean for there the effects of the
wave are distributed over the full depth of the water column and the free
surface changes its level imperceptibly. The ocean is decoupled from
earthquake, the ocean quenches the volcanoes lava flow, the undersea knows not
fire or lightning or arcs or flames.
Our underwater cousins will have a very different view of electricity.
We land based creatures recoil at the lethality of the air water electricity
interface. But to fully submerged fully wetted ocean creatures electric shock
is virtually unknown. Since ocean water is salty it is highly conducting. As a
result it is virtually impossible to build a voltage gradient in the sea that
is lethal. Navies have learned to their grief that they cannot protect their
ships from underwater terrorists by inserting highly charged electrodes in the
water. Underwater welders have learned to their relief that, fully submerged
they are invulnerable to shock. This is so even when the flow of electricity
causes sparks to jump between their teeth when they open their mouth. The major
health admonition is to keep the mouth shut or lose the fillings in the teeth.
With this modicum of understanding of the physical differences between
the water world and the world of earth and sky can we venture a guess as to the
state of technology? We may well ask Whether electricity would be a servant to
these shock proof people. Assuredly but in a very different mode for they would
be aware of electro-chemical effects in daily life. The deposition of manganese
nodules and manganese crusts, the migration of minerals and metals,
electrochemical processes in the extraction of calcium carbonate from the water
as biological organisms manufacture their shells. Ion movement is everywhere.
Batteries and thermionic devices would have been invented long before
generators. Underwater structures of every conceivable size and description
would be constructed by electro chemical deposition of calcium carbonate on
filament matrices. Metals themselves would be extracted by electrochemical
processes and copper as a conductor would be an early arrival on the technology
scene.
Buoyancy propulsion would be the primary means of transport. Vehicles
shaped like underwater gliders (but with very stubby wings) would employ a fuel
like hydrazine to generate a non polluting gas at depth which would make the
vehicle buoyant and it would streak for the surface at sixty knots. Nearing the
surface it would vent the gas and now glide down to depth. No more efficient
propulsion system has been invented for the land, why would it not be the mode
of the day in the ocean? Other vehicles resembling underwater dirigibles would
be employed for cargo transport. The propeller would probably have been
invented. Of course the rocket which leaves the water and travels through the
air would be the mode for really high speed delivery over distance, bypassing
an inconceivable invention, the airplane.
Throughout the ages acoustics would have been the means o communication
and it is highly unlikely that electromagnetic communication would have
developed. This form of communication does not penetrate water and would
require a transducer and cable to become available to the underwater citizenry.
Why would any society use electromagnetics for communication when they could
use light. Our underwater society would of necessity preceded and precluded
electromagnetics with lasers and fibre optics. The information capabilities of
coherent light are so far superior to electromagnetics that soon this earth
bound world will replace its satellites with fibre optic light transmission in
cables on land and sea. Soon truly high speed computers will employ a laser
memory chip with memories orders of magnitude greater than our fastest electron
devices.
Need we go on, for this is an introduction intending to convey the idea
that the watery planet is a very different place than the earthly planet. All
of the functions of humans and society can be carried out in each place, but
the manner and means by which they will be conducted will, in the long run be
dramatically different. Oceanic music, art and poetry is, and will be different
than that of produced by the pipes of Pan. Oceanic Law and Commerce will be
dramatically different from Land Law and Commerce. Ocean Engineering and
oceanic physics bear little relationship to their land counterparts. Animal
husbandry and fish farming bear little resemblance to each other. The mariner
is a different breed of human than the teamster. The sailor is unlike the
soldier and both are different from the amphibious marine.
Humans have yet to fully comprehend these differences. Ever and again
societies are organized in terms of the land and its technologies and ever and
again these societies turn to the watery world for survival. As they awkwardly
adapt the sea punishes them for their ignorance, even as it rewards them as
they learn the maritime arts. We shall trace this evolution from the dawn of
Society to a projection of the 21st century. We shall trace it in terms of the
physiology, psychology, and anthropology of the human animal. We shall trace it
in terms of the law, technology, and politics of the human animal. We shall
project it in terms of new technology and the readaptation of the human as a
marine mammal, and we shall wear the mantle of historian and prophet with an
understanding that the world of earth and sky is a world, perhaps a universe,
apart from the world of water.