The Blue Planet
The Earth, with its
atmosphere and oceans, its complex biosphere,
its crust of relatively oxidised, silica rich,
sedimentary, igneous, and metamorphic rocks
overlaying [a magnesium silicate mantle and
core] of metallic iron, with its ice caps, deserts,
forests, tundra, jungles, grasslands, fresh-water
lakes, coal beds, oil deposits, volcanoes, fumaroles,
factories, automobiles, plants, animals, magnetic
field, ionosphere, mid-ocean ridges, convincing
mantle... is a system of stunning complexity.
J. S. Lewis, American Geologist 54
An
imaginary space-traveler approaching the solar
system from interstellar space would encounter
a very interesting scene. Let us imagine that
we are such travelers and that we're arriving
at the plane of the ecliptic-the great circle
of the celestial sphere in which all the major
planets of our solar system move. The first
planet we will meet is Pluto. This planet is
quite a cold place. The temperature is around
-238°C. The planet has a thin of atmosphere
that is in a gaseous state only when it draws
slightly nearer to the sun in its rather elliptical
orbit. At other times, the atmosphere becomes
a mass of ice. Pluto, briefly, is a lifeless
sphere enveloped in ice.
Advancing towards the sun, you next encounter
Neptune. It is cold too: approximately -218°C.
The atmosphere, consisting of hydrogen, helium
and methane, is poisonous for life. Winds blowing
nearly 2,000 kilometers an hour blast across
the surface of the planet.
Next is Uranus: a gaseous planet with rocks
and ice on its surface. The temperature is -214°C
and the atmosphere again consists of hydrogen,
helium and methane--unsuitable for human beings
to live in.
You reach Saturn after Uranus. This is the
second biggest planet in the solar system and
is particularly notable for the system of rings
encircling it. These rings are made up of gases,
rock and ice. One of the many interesting things
about Saturn is that it is composed entirely
of gas: 75% hydrogen and 25% helium and its
density is less than that of water. If you want
to "land" on Saturn, you'd better design your
spaceship to be like an inflatable boat! The
average temperature is again very low: -178°C.
Coming up next is Jupiter: the biggest planet
in the solar system, it is 318 times the size
of Earth. Like Saturn, Jupiter is also a gaseous
planet. Since it is difficult to distinguish
between "atmosphere" and "surface" on such planets,
it is hard to say what the "surface temperature"
is but in the upper reaches of the atmosphere,
the temperature is -143°C. A notable feature
of Jupiter's atmosphere is something called
the Great Red Spot. It was first noticed 300
hundred years ago. Astronomers now know that
it is an enormous storm system that has been
raging in the Jovian atmosphere for centuries.
It is big enough to swallow up a couple of planets
the size of Earth whole. Jupiter may be a visually
thrilling planet, but it's no home for people,
who would be killed instantly by its freezing
temperatures, violent winds, and intense radiation.
Then comes Mars. The atmosphere of Mars cannot
sustain human life because it is mostly carbon
dioxide. The surface is everywhere pocked with
craters: the result of eons of meteor impacts
and strong winds blowing across the surface
that can raise sandstorms that last for days
or weeks at a time. The temperature varies rather
much but drops as low as -53°C. There has been
much speculation that Mars might harbor life,
but all the evidence shows that this is a lifeless
world too.
Speeding away from Mars and heading toward
the sun, we notice a blue planet that we decide
to skip for the time being while we explore
some more. Our search brings us to a planet
called Venus. This planet is everywhere shrouded
in brilliant white clouds but the temperature
at the surface is 450°C, which is enough to
cause lead to melt. The atmosphere is composed
mostly of carbon dioxide. At the surface, the
atmospheric pressure is equal to 90 terrestrial
atmospheres: on Earth, you'd have to descend
a kilometer into the sea before you reached
a pressure that high. The atmosphere of Venus
contains layers of gaseous sulfuric acid several
kilometers deep. When it rains on Venus, it
isn't raining rain you know: it's raining acid.
No human or other life could exist in such a
hellish place for a second.
We press on and come to Mercury, a small, rocky
world, blasted by the heat and radiation of
the sun. Its rotation has been so slowed down
by its proximity to the sun that the planet
makes only three full axial rotations in the
time it takes to revolve twice around the sun.
In other words, two of Mercury's "years" is
equal to three of its "days". Because of this
prolonged diurnal cycle, one side of Mercury
becomes extremely hot while the other is extremely
cold. The difference between the daytime and
nighttime sides of Mercury is as much as 1,000°C.
Of course such an environment cannot support
life.
Even Mars, the only other planet
in the solar system to come close to resembling
the earth physically, is nothing but an
arid, lifeless ball of rock. |
To sum up, we've taken looks at eight planets
and not one of them, including their fifty-three
satellites offers anything that might serve
as a haven for life. Each of them is lifeless
ball of gas, ice, or rock.
But the blue planet that we skipped over a
while ago? That one's very different from the
others. With its hospitable atmosphere, surface
features, ambient temperatures, magnetic field,
and supply of elements and set just the right
distance from the sun, it almost seems as if
it had been specially created to be a home for
life.
And, as we shall discover, it was.
THE
INFERNAL SURFACE OF VENUS
The surface temperature on Venus reaches
as high as 450° C, which is sufficient
to melt lead. The surface of this world
resembles a ball of fire covered with
lava. Its atmosphere is thick with sulfuric
acid and a sulfuric acid rain falls
constantly. The atmospheric pressure
at the surface is 90 times that of Earth:
the equivalent of a depth of 1,000 meters
beneath the sea. |
|
A Brief Digression and
Warning About "Adaptation"
In the rest of this chapter we will be examining
features of Earth that make it clear that our
planet was created specifically for the support
of life. But before we do that, we need to make
a brief digression in order to avoid the possibility
of any misunderstanding. This digression is
especially for those who are in the habit of
recognizing the theory of evolution as a scientific
truth and who strongly believe in the concept
of "adaptation".
"Adaptation" is the noun
form of the verb "adapt". "Adapt" implies a
modification according to changing circumstances.
As used by evolutionists, it means a "modification
of an organism or its parts that makes it more
fit for existence under the conditions of its
environment". The theory of evolution claims
that all life on earth is derived from a single
organism (a single common ancestor) that itself
came into being as a result of chance and the
theory makes heavy use of this sense of the
word "adaptation" to support its case. Evolutionists
hold that living organisms change into new species
by adapting to their environment. We have discussed
the invalidity of this claim, that mechanisms
of adaptation to natural conditions in living
beings come into play only under certain circumstances
and it can never transform one species into
another in detail in our other books.55
(This is summed up in the appendix "Evolution
Deceit" in this book) The theory of evolution
with its concept of "adaptation" is really just
a form of Lamarckism, a theory of organic evolution
that holds that environmental changes cause
structural changes in animals and plants that
can be transmitted to offspring- a theory that
has been soundly and rightly dismissed by scientific
circles.
Yet even though it has no scientific basis,
the idea of adaptation impresses most people
and that is why we must address this point here
before going on. From belief in the adaptability
of life-forms, it is only a step to the idea
that life could have developed on other planets
as well as it did once on Earth. The possibility
of little green creatures living on Pluto who
might work up a slight sweat when the temperature
soared to 238°C, who breathe helium instead
of oxygen, and who drink sulfuric acid instead
of water somehow tickles people's fancy, especially
people whose fancies have been richly nourished
by the products of Hollywood studios.
But these are only such stuff as dreams (and
Hollywood movies) are made of however and evolutionists
who are better informed about biology and biochemistry
do not even attempt to defend such notions.
They know quite well that life exists only if
necessary conditions and elements are available.
If they really believe in them at all, the partisans
of the little green men (or other alien life-forms)
are those who blindly adhere to the theory of
evolution and are ignorant of even the basics
of biology and biochemistry and who, in their
ignorance, come up with preposterous scenarios.
So in understanding the error in the concept
of adaptation, the first thing that we need
to note is that life can only exist if certain
essential conditions and elements are present.
The only model of life that is based on scientific
criteria is that of carbon-based life and scientists
are in agreement that there is no other form
of life to be found anywhere elsewhere in the
universe.
Carbon is the sixth element in the periodic
table. This atom is the basis of life on earth
because all organic molecules (such as nucleic
acids, amino acids, proteins, fats, and sugars)
are formed by the combination of carbon with
other elements in various ways. Carbon forms
millions of different types of proteins by combining
with hydrogen, oxygen, and nitrogen etc. No
other elements can take the place of carbon.
As we shall see in the sections ahead, no element
but carbon has the ability to form the many
different kinds of chemical bonds on which life
depends.
Consequently if life is going
to exist on any planet anywhere in the universe
it is going to have to be carbon-based.56
There are a number of conditions that are absolutely
essential in order for carbon-based life to
exist. For example, carbon-based organic compounds
(like proteins) can exist only within a certain
range of temperatures. They start to dissociate
over 120°C and are irrecoverably damaged if
they are frozen below -20°C. But it is not only
temperature that plays a vital role in determining
the allowable limits of suitable conditions
for carbon-based life to exist: so too do the
type and amount of light, the strength of gravity,
the composition of the atmosphere, and the strength
of the magnetic field. Earth provides precisely
such conditions as are needed to make life possible.
If even one of conditions were to be changed,
if average temperatures surpassed 120°C for
example, there would be no life on Earth.
Therefore our little green creatures who might
work up a slight sweat when the temperature
soars to 238°C, who breathe helium instead of
oxygen, and who drink sulfuric acid instead
of water are not going to exist anywhere because
carbon-based life-forms cannot survive under
such conditions and carbon-based life-forms
are the only kind there is. Life can only exist
in an environment within limits and under conditions
that are deliberately designed for life. That
is true of life in general and of human beings
in particular.
Earth is such a deliberately-designed environment.
The Temperature of the
World
Temperature and atmosphere are the first essential
factors for life on Earth. The Blue Planet has
both a temperature that is livable and an atmosphere
that is breathable for living things, especially
for such complex living things as human beings.
These two extremely different factors however
have come into being as a result of conditions
that turn out to be ideal for both.
One of these is the distance between the earth
and the sun. Earth could not be a home for life
if were as near the sun as Venus is or as far
from it as Jupiter: carbon-based molecules can
only survive between the limits of 120 and -20°C
and Earth is the only planet whose average temperatures
fall within those limits.
When one considers the universe as a whole,
coming across a range of temperatures as narrow
as this is quite a difficult task because temperatures
in the universe vary from the millions of degrees
of the hottest stars to absolute zero (-273°C).
In such a vast range of temperatures, the thermal
interval that allows life to exist is slim indeed;
but the planet Earth has it.
Unlike the other 63 major planets and satellites
in our solar system, the planet Earth is
the only one possessing an atmosphere, an
ambient temperature, and a surface suitable
for life. Although liquid water, a fundamental
requirement for life, is found nowhere else
in the solar system, three-fourths of the
earth's surface is covered with it. |
The American geologists Frank
Press and Raymond Siever draw attention to the
average temperatures prevailing on Earth. They
note that "life as we know it is possible over
a very narrow temperature interval. This interval
is perhaps 1 or 2 percent of the range between
a temperature of absolute zero and the surface
temperature of the Sun." 57
The maintenance of this thermal range is also
related to the amount of heat that the sun radiates
as well as to the distance between the earth
and the sun. According to calculations, a reduction
of just 10% in the sun's radiant energy would
result in the earth surface's being covered
by layers of ice many meters thick and that
if it were to increase by a little, all living
things would be scorched and die.
Not only must the average temperature be ideal:
the available heat must also be distributed
fairly equally over the whole planet. A number
of special precautions have been taken to ensure
that this in fact happens.
The earth's axis is inclined 23° 27'to the
plane of the ecliptic. This inclination prevents
overheating of the atmosphere in the regions
between the poles and the equator, causing them
to become more temperate. If this inclination
did not exist, the temperature gradient between
the poles and equator would be much higher than
it is and the temperate zones wouldn't be so
temperate-or livable.
The rotational speed of Earth on its axes also
helps keep the thermal distribution in balance.
The earth makes a complete rotation once every
24 hours with the result that alternating periods
of daylight and darkness are fairly short.
Because they are short, the thermal gradient
between the light and dark sides of the planet
are quite modest. The importance of this can
be seen in the extreme example of Mercury, where
a day lasts longer than a year and where the
difference between daytime and nighttime temperatures
is almost 1,000°C.
Many
completely different factors such as the
distance between Earth and Sun, the planet's
rotational speed, the inclination of its
axes, and the geographical features of
the surface all combine to ensure that
our world is heated in just the right
way that life needs and that this heat
is adequately distributed.
|
|
Geography also helps distribute heat equally
over the earth. There is a difference of about
100°C between the polar and equatorial regions
of Earth. If such a thermal gradient were to
exist over a completely level area, the result
would be winds reaching speeds as high as 1,000
kilometers an hour sweeping away everything
in their path. Instead, Earth is full of geographical
barriers that block the huge movements of air
that such a thermal gradient would otherwise
cause. Those barriers are chains of mountains
like the one that stretches from the Pacific
in the east to the Atlantic in the west, beginning
with the Himalayas in China and continuing with
the Taurus mountains in Anatolia and the Alps
in Europe. At sea, the excess heat in the equatorial
regions is transferred north and south thanks
to the superior ability of the water to conduct
and dissipate heat.
At the same time, there are a number of auto-control
systems that help keep the atmospheric temperature
in balance. For example when a region heats
up, the rate at which its water vaporizes increases,
causing clouds to form. These clouds reflect
more light back into space, preventing both
the air and the surface below from getting warmer.
The Mass of the Earth
and the Planet's Magnetic Field
The size of Earth is no less important for
life than are its distance from the Sun, its
rotational speed, or geographical features.
Looking at the planets we see a great range
of sizes: Mercury is less than a tenth the size
of Earth while Jupiter is 318 times bigger.
Is the size of Earth as compared with other
planets "coincidental"? Or is it deliberate?
When we examine the dimensions of Earth we
can easily see that our planet was designed
to be exactly as big as it is. American geologists
Frank Press and Raymond Siever comment on Earth's
"fitness":
And Earth's
size was just about right -not too small as
to lose its atmosphere because its gravity was
too small to prevent gasses from escaping into
space, and not so large that its gravity would
hold on to too much atmosphere, including harmful
gases.58
In addition to its mass, the interior of Earth
is also specially designed. Because of its core,
Earth has a strong magnetic field whose role
in the preservation of life is vital. According
to Press and Siever:
The earth's interior is a
gigantic but delicately balanced heat engine
fueled by radioactivity …Were it running more
slowly, geological activity would have proceeded
at a slower pace. Iron might not have melted
and sunk to form the liquid core, and the magnetic
field would never have developed…if there had
been more radioactive fuel and a faster running
engine, volcanic gas and dust would have blotted
out the Sun, the atmosphere would have been
oppressively dense, and the surface would have
been racked by daily earthquakes and volcanic
explosions.59
At the center of the earth there's a sort
of heat-driven engine that is so perfectly
adjusted that it is strong enough to generate
the planet's magnetic shield yet not so
strong as to engulf the crust above in lava. |
The magnetic field these geologists talk about
is of great importance for life. This magnetic
field originates from the structure of Earth's
core. The core consists of heavy elements like
iron and nickel that are capable of holding
a magnetic charge. The inner core is solid while
the outer one is liquid. The two layers of the
core move around each other and this movement
is what generates Earth's magnetic field. Extending
far beyond the surface, this field protects
Earth from the effects of detrimental radiation
from outer space. The radiation of stars other
than the sun cannot travel through this shield.
The Van Allen Belt, whose magnetic lines extend
ten thousand miles from Earth, protects the
globe from this deadly energy.
It is calculated that the plasma clouds trapped
by the Van Allen Belt sometimes attain energy
levels 100 billion times more powerful than
that the atomic bomb released over Hiroshima.
Cosmic rays may be equally detrimental. The
earth's magnetic field however lets only 0.1%
of that radiation through and that is absorbed
by the atmosphere. The electrical energy needed
to create and maintain such a magnetic field
is nearly a billion amperes, as much as mankind
has generated throughout history.
If this protective shield did not exist, life
would be destroyed by harmful radiation from
time to time and might not have come into existence
at all. But as Press and Siever point out, Earth's
core is exactly designed to keep the planet
safe.
In other words, there is a special purpose
as stated in the Qur'an:
We made the sky a persevered
and protected roof yet still they turn away
from Our Signs. (Surat al-Anbiya: 32)
The Fitness of the Atmosphere
As we have seen, Earth's physical features--mass,
structure, temperature and so on-are "just right
for life". Such features alone are not enough
to allow life to exist on Earth however. Another
vital factor is the composition of the atmosphere.
We noted above how science-fiction movies sometimes
mislead people. One example of how they do this
is how easily space travelers and explorers
come across planets with breathable atmospheres:
they seem to be lying all over the place. If
we could explore the real universe, we'd discover
that this isn't true at all: the possibility
of another planet's having an atmosphere that
we could breathe is most unlikely. That's because
the atmosphere of Earth is specially designed
to support life in a number of crucial ways.
The
atmosphere of Earth is composed of 77% nitrogen,
21% oxygen, and 1% carbon dioxide. Let's start
with the most important gas: oxygen. Oxygen
is vitally important to life because it enters
into most of the chemical reactions that release
the energy that all complex life-forms require.
Carbon compounds react with oxygen. As a result
of these reactions, water, carbon dioxide, and
energy are produced. Small "bundles" of energy
that are called ATP (adenosine triphosphate)
and are used in living cells are generated by
these reactions. This is why we constantly need
oxygen to live and why we breathe to satisfy
that need.
The interesting aspect of this business is
that the percentage of oxygen in the air we
breathe is very precisely determined. Michael
Denton writes on this point:
Could your
atmosphere contain more oxygen and still support
life? No! Oxygen is a very reactive element.
Even the current percentage of oxygen in the
atmosphere, 21 percent, is close to the upper
limit of safety for life at ambient temperatures.
The probability of a forest fire being ignited
increases by as much as 70 percent for every
1 percent increase in the percentage of oxygen
in the atmosphere.60
Even a 5% increase in the amount of oxygen
in our planet's atmosphere would result
in fires that would destroy much of its
forests. |
According to the British biochemist James Lovelock:
Above 25%
very little of our present land vegetation could
survive the raging conflagrations which would
destroy tropical rain forests and arctic tundra
alike... The present oxygen level is at a point
where risk and benefit nicely balance.61
That the proportion of oxygen in the atmosphere
remains at this precise value is the result
of a marvelous "recycling" system: Animals constantly
consume oxygen and produce carbon dioxide, which,
for them, is not breathable. Plants do just
the opposite: they take in carbon dioxide, which
they need to live, and release oxygen instead.
Thanks to this system, life goes on. Plants
release millions of tons of oxygen into the
atmosphere every day.
Without the cooperation and balance of these
two different groups of living things, our planet
would be unlivable. For example, if living things
only took in carbon dioxide and released oxygen,
the earth's atmosphere would support combustion
much more easily than it does and even a tiny
spark could set off enormous fires. Similarly,
if both took in oxygen and released carbon dioxide,
life would eventually die out when all the oxygen
had been used up.
In fact, the atmosphere is in a state of equilibrium
in which, as Lovelock says, risk and benefit
are nicely balanced.
Another finely-tuned aspect of our atmosphere
is its density, which is ideally suited for
us to breathe.
The Atmosphere and Respiration
We breathe every moment of our lives. We continuously
take the air into our lungs and let it out.
We do it so much that we might think of it as
normal. In fact, respiration is quite a complex
process.
Our bodily systems are so perfectly designed
that we don't need to think about breathing.
Our body estimates how much oxygen it needs
and arranges for the delivery of the right amount
whether we're walking, running, reading a book,
or sleeping. The reason breathing is so important
to us is that the millions of reactions that
must constantly take place in our bodies to
keep us alive all require oxygen.
Your ability to read this book is thanks to
the millions of cells in the retina of your
eye constantly being supplied with oxygen-derived
energy. Similarly, all the tissues of our bodies
and the cells forming them get their energy
from the "burning" of carbon compounds in oxygen.
The product of this burning-carbon dioxide-must
be discharged from the body. If the level of
oxygen in your bloodstream drops to low, the
result is fainting; and if the absence of oxygen
persists for more than a few minutes, the result
is death.
And that's why we breathe. When we inhale,
oxygen floods into about 300 million tiny chambers
in our lungs. Capillary veins attached to these
chambers absorb the oxygen in a twinkling and
convey it first to heart and then to every other
part of our body. The cells of our body use
this oxygen and release carbon dioxide into
the blood, which conveys it back to the lungs
where it is expelled. The whole thing takes
less than half a second: "clean" oxygen comes
in and "dirty" carbon dioxide goes out.
You might be wondering why there are so many
(300 million) of those little chambers in the
lungs. They're there to maximize the surface
area that is exposed to the air. They're carefully
folded up to occupy as little space as possible;
if they were unfolded, the result would be enough
to cover a tennis court.
There is another point here that we need to
keep in mind. The chambers of the lungs and
the capillaries connecting to them are designed
so small and perfectly in order to increase
the rate at which oxygen and carbon dioxide
are exchanged. But that perfect design depends
on other factors: the density, viscosity, and
pressure of air must all be right in order for
the air to move properly in and out of our lungs.
At sea level, air pressure is 760 mm of mercury
and its density is about 1 gram/liter. Again
at sea level, its viscosity is nearly 50 times
that of water. You might think these numbers
unimportant but they are vital for our lives
because, as Michael Denton notes:
The overall
composition and general character of the atmosphere-its
density, viscosity, and pressure, etc--must
be very similar to what it is, particularly
for air-breathing organisms.62
When we breathe, our lungs use energy to overcome
a force called "airway resistance". This force
is the result of the resistance of air to movement.
Owing to the physical properties of the atmosphere
however, this resistance is weak enough that
our lungs can take air in and let it out with
a minimum expenditure of energy. If air resistance
were higher, our lungs would be forced to work
harder to enable us to breathe. This can be
explained by an example. It easy to draw water
into the needle of an injector but drawing honey
in is much more difficult. The reason is that
honey is denser than water and also more viscous.
If the density, viscosity, and pressure of
air were higher, breathing would be as difficult
as drawing honey into a needle. Someone might
say "That's easy to fix. We'll just make the
hole of the needle larger to increase the rate
of flow." But if we did that in the case of
the capillaries in the lungs, the result would
be to reduce the size of the area in contact
with air, with the result that less oxygen and
carbon dioxide would be exchanged in the same
amount of time and the respiratory needs of
the body would not be satisfied. In other words,
the individual values of air's density, viscosity
and pressure must all fall within certain limits
in order for it to be breathable and those of
the air we breathe do exactly that.
Michael Denton comments on this:
It is clear
that if either the viscosity or the density
of air were much greater, the airway resistance
would be prohibitive and no conceivable redesign
of the respiratory system would be capable of
delivering sufficient oxygen to a metabolically
active air-breathing organism... By plotting
all possible atmospheric pressures against all
possible oxygen contents, it becomes clear that
there is only one unique tiny area... where
all the various conditions for life are satisfied...
It is surely of enormous significance that several
essential conditions are satisfied in this one
tiny region in the space of all possible atmospheres.63
The numerical values of the atmosphere are
not only necessary for us to breathe but are
also essential for our Blue Planet to stay blue.
If sea-level atmospheric pressure were much
lower than its present value, the rate of water
vaporization would be much higher. Increased
water in the atmosphere would have a "greenhouse
effect" trapping more heat and raising the average
temperature of the planet. On the other hand,
if the pressure were much higher, the rate of
water vaporization would be less, turning large
parts of the planet into desert.
All these finely-tuned equilibriums indicate
that our atmosphere has been deliberately designed
precisely so that life on Earth can exist. This
is the reality discovered by science and it
shows us again that the universe is not just
an accidental jumble of matter. Undoubtedly
there is a Creator ruling the universe, shaping
matter as He wants it to be, and reigning over
the galaxies, stars and planets under His sovereignty.
That supreme power, as the Qur'an tells us,
is Allah, Lord of the whole universe.
And the Blue Planet on which we live is specially
designed and "smoothed out" by Allah for people
as stated in the Qur'an. (Surat
an-Naziat 30) There are other verses
revealing that Allah has created Earth for mankind
to live in:
It is Allah who made
the earth a stable home for you and the sky
a dome, and formed you, giving you the best
of forms, and provided you with good and wholesome
things. That is Allah, your Lord. Blessed be
Allah, the Lord of all the worlds. (Surah Ghafir:
64)
It is He Who made the
earth submissive to you, so walk its broad trails
and eat what it provides. The Resurrection is
to Him. (Surat al-Mulk: 15)
The Equilibriums that
Make Life Possible
The things we have mentioned so far are just
a few of the delicate equilibriums that are
essential for life on Earth. Examining the earth,
we can make the list of the "essential factors
for life" a long as we please. The American
astronomer Hugh Ross has made a list of his
own:
Surface Gravity;
- If stronger: atmosphere would retain too much
ammonia and methane
- If weaker: planet's atmosphere would lose
too much water
Distance From Parent
Star;
- if farther: planet would be too cool for a
stable water cycle
- if closer: planet would be too warm for a
stable water cycle
Thickness of crust;
- if thicker: too much oxygen would be transferred
from the atmosphere to the crust
- if thinner: volcanic and tectonic activity
would be too great
Rotation period;
-If longer: diurnal temperature differences
would be too great
-If shorter: atmospheric wind velocities would
be too great
Gravitational interaction
with moon;
- If greater: tidal effects on the oceans, atmosphere,
and rotational period would be too severe
- If less: orbital obliquity changes would cause
climatic instabilities
Magnetic Field;
- If stronger: electromagnetic storms would
be too severe
- If weaker: inadequate protection from hard
stellar radiation
Albedo (Ratio of Reflected
light to total amount falling on surface);
- If greater: runaway ice age would develop
- If less: runaway greenhouse effect would develop
Oxygen to nitrogen ratio
in the atmosphere;
- if larger: advanced life functions would proceed
too quickly
- if smaller: advanced life functions would
proceed too slowly
Carbon dioxide and water
vapour levels in atmosphere;
- if greater: runaway greenhouse effect would
develop
- if less: greenhouse effect would be insufficient
Ozone level in Atmosphere;
- if greater: surface temperature would be too
low
- if less: surface temperatures would be too
high; there would be too much uv radiation at
the surface
Seismic
Activity;
- if greater: too many life-forms would be destroyed
- if less: nutrients on ocean floors (from river
runoff) would not be recycled to the continents
through tectonic uplift. 64
These are just some of the "design decisions"
that had to be made in order for life to exist
and survive. But even these are enough to show
that the earth did not come into being as a
result of chance nor was it formed as a result
of a lucky chain of events.
These and a myriad other details reaffirm a
plain and simple truth: Allah and Allah alone
created the universe, the stars, planets, mountains,
and seas perfectly, giving life to human beings
and other living things, and placing His creations
under the control of mankind. Allah and Allah
alone, the source of mercy and might, is powerful
enough to create something from nothingness.
This perfect creation of Allah is described
in the Qur'an thus:
Are you stronger in structure
or is heaven? He built it. He raised its vault
high and made it level. He darkened its night
and brought forth its morning light. After that
He smoothed out the earth and brought forth
from it its water and its pastureland and made
the mountains firm for you and for your livestock
to enjoy. (Surat an-Nazi'at: 27-33) |